Long-Haul Analog Photonics

A paper on long-haul analog photonics is presented using theory and experimental results. Various analog fiber-optic modulation formats are reviewed, including intensity modulation with direct detection, phase modulation with interferometric demodulation, and suppressed-carried techniques. Modulation linearization methods are reviewed. The limitations of and requirements for photodiode detectors are described.

[1]  M.C. Wu,et al.  Dynamic Range of Frequency Modulated Direct-Detection Analog Fiber Optic Links , 2009, Journal of Lightwave Technology.

[2]  H. Kogelnik,et al.  Measurement of depolarization and scaling associated with second-order polarization mode dispersion in optical fibers , 1999, IEEE Photonics Technology Letters.

[3]  N. Edagawa,et al.  Analysis of laser phase noise to intensity noise conversion by chromatic dispersion in intensity modulation and direct detection optical-fiber transmission , 1990 .

[4]  F. Bucholtz,et al.  Interchannel Crosstalk Reduction in an Analog Fiber Link Using Dispersion Management , 2008, IEEE Photonics Technology Letters.

[5]  H. Blauvelt,et al.  Theoretical and experimental investigation of conversion of phase noise to intensity noise by Rayleigh scattering in optical fibers , 1990 .

[6]  M. V. Deventer,et al.  Polarization properties of stimulated Brillouin scattering in single-mode fibers , 1994 .

[7]  K Colladay,et al.  RF Power Conversion Efficiency of Photodiodes Driven by Mach–Zehnder Modulators , 2010, IEEE Transactions on Microwave Theory and Techniques.

[8]  A. Nirmalathas,et al.  Intermodulation Distortion Improvement for Fiber–Radio Applications Incorporating OSSB+C Modulation in an Optical Integrated-Access Environment , 2007, Journal of Lightwave Technology.

[9]  M. G. Parent,et al.  Fiber-optic remoting of an ultrahigh dynamic range radar , 1998 .

[10]  A. Karim,et al.  Noise Figure Reduction in Externally Modulated Analog Fiber-Optic Links , 2007, IEEE Photonics Technology Letters.

[11]  Johannes W. Hofstraat,et al.  Rare-earth doped polymers for planar optical amplifiers , 2002 .

[12]  A.H. Gnauck,et al.  Optical phase-shift-keyed transmission , 2005, Journal of Lightwave Technology.

[13]  Frank Bucholtz,et al.  4 Gbit/s transmission over single-channel Raman-amplified 105 km link , 2004 .

[14]  A. Katz,et al.  Wideband dynamic range improvement of microwave photonic links , 2005, IEEE Conference Avionics Fiber-Optics and Photonics, 2005..

[15]  Masaharu Ohashi,et al.  Performance of strain-free stimulated Brillouin scattering suppression fiber , 1996 .

[16]  Michael Y. Frankel,et al.  Single-sideband suppressed-carrier optical modulator for wideband rf signal processing , 1998 .

[17]  H. Kogelnik,et al.  The statistics of PMD-induced chromatic fiber dispersion , 1999 .

[18]  A. Nirmalathas,et al.  Analysis of optical carrier-to-sideband ratio for improving transmission performance in fiber-radio links , 2006, IEEE Transactions on Microwave Theory and Techniques.

[19]  H. Fragnito,et al.  Experimental and numerical investigation of the SBS-threshold increase in an optical fiber by applying strain distributions , 2005, Journal of Lightwave Technology.

[20]  F. Bucholtz,et al.  Noise penalty of highly saturated erbium-doped fiber amplifiers in analog links , 2006, IEEE Photonics Technology Letters.

[21]  I. Lin,et al.  Photonic synthesis of broadband microwave arbitrary waveforms applicable to ultra-wideband communication , 2005, IEEE Microwave and Wireless Components Letters.

[22]  G. Agrawal Fiber‐Optic Communication Systems , 2021 .

[23]  Anthony J. Kenyon,et al.  Recent developments in rare-earth doped materials for optoelectronics , 2002 .

[24]  L. Swingen,et al.  Wide-band predistortion linearization for externally modulated long-haul analog fiber-optic links , 2006, IEEE Transactions on Microwave Theory and Techniques.

[25]  B. Moslehi Noise power spectra of optical two-beam interferometers induced by the laser phase noise , 1986 .

[26]  G. Yabre,et al.  Analog direct-modulation behavior of semiconductor laser transmitters using optical FM demodulation , 1998 .

[27]  D. Persechini,et al.  Nonlinearity of p-i-n photodetectors , 1993, IEEE Photonics Technology Letters.

[28]  K. Williams,et al.  Design considerations for high-current photodetectors , 1999 .

[29]  K.J. Williams,et al.  Sampled Analog Optical Links , 2009, IEEE Transactions on Microwave Theory and Techniques.

[30]  S. Demiguel,et al.  High-saturation current wide-bandwidth photodetectors , 2004, IEEE Journal of Selected Topics in Quantum Electronics.

[31]  K. Williams,et al.  Thermally induced nonlinearities in high-speed p-i-n photodetectors , 2004, IEEE Photonics Technology Letters.

[32]  X.B. Xie,et al.  Suppressed-carrier large-dynamic-range heterodyned microwave fiber-optic link , 2004, 2004 IEEE International Topical Meeting on Microwave Photonics (IEEE Cat. No.04EX859).

[33]  K.J. Williams,et al.  Linearization of Phase-Modulated Analog Optical Links Employing Interferometric Demodulation , 2009, Journal of Lightwave Technology.

[34]  W.S.C. Chang,et al.  Increased linear dynamic range by low biasing the Mach-Zehnder modulator , 1993, IEEE Photonics Technology Letters.

[35]  K. Williams,et al.  Microwave photonics , 2002 .

[36]  C. Fludger,et al.  Electrical measurements of multipath interference in distributed Raman amplifiers , 2001 .

[37]  J. Zhang,et al.  Modeling intensity noise caused by stimulated Brillouin scattering in optical fibers , 2005, (CLEO). Conference on Lasers and Electro-Optics, 2005..

[38]  José Capmany,et al.  Microwave photonics combines two worlds , 2007 .

[39]  H. Nyquist Thermal Agitation of Electric Charge in Conductors , 1928 .

[40]  R. W. Tkach,et al.  Fibre Brillouin amplifiers , 1989 .

[41]  J. McKinney,et al.  Photonically assisted generation of continuous arbitrary millimetre electromagnetic waveforms , 2003 .

[42]  A.L. Campillo Interchannel nonlinear crosstalk in analog polarization modulated WDM systems , 2006, Journal of Lightwave Technology.

[43]  J.D. McKinney,et al.  Compensation of the effects of antenna dispersion on UWB waveforms via optical pulse-shaping techniques , 2006, IEEE Transactions on Microwave Theory and Techniques.

[44]  Changyuan Yu,et al.  Tunable chromatic dispersion compensation in 40-Gb/s systems using nonlinearly chirped fiber Bragg gratings , 2002 .

[45]  Afshin S. Daryoush,et al.  Maximum dynamic range operation of a microwave external modulation fiber-optic link , 1993 .

[46]  S. Montebugnoli,et al.  Large antenna array remoting using radio‐over‐fiber techniques for radio astronomical application , 2005 .

[47]  V. Urick,et al.  Analysis of an Analog Fiber-Optic Link Employing a Low-Biased Mach–Zehnder Modulator Followed by an Erbium-Doped Fiber Amplifier , 2009, Journal of Lightwave Technology.

[48]  G. Betts,et al.  An analytic and experimental comparison of direct and external modulation in analog fiber-optic links , 1990 .

[49]  A. Karim,et al.  Microwave Photonic Link with Carrier Suppression for Increased Dynamic Range , 2006 .

[50]  J. McKinney,et al.  Millimeter-wave arbitrary waveform generation with a direct space-to-time pulse shaper. , 2002, Optics letters.

[51]  Yoshiki Kuhara,et al.  Characterization and theoretical analysis of second-order intermodulation distortion of InGaAs/InP p-i-n photodiode modules for fiber-optic CATV , 1997 .

[52]  F. Bucholtz,et al.  Comparison of crosstalk for amplitude and phase modulation in an analog fiber optic link , 2004, 2004 IEEE International Topical Meeting on Microwave Photonics (IEEE Cat. No.04EX859).

[53]  Linn F. Mollenauer,et al.  Performance degradation induced by polarization-dependent loss in optical fiber transmission systems with and without polarization-mode dispersion , 2003 .

[54]  B. Jalali,et al.  Adaptive RF-photonic arbitrary waveform generator , 2003, IEEE Photonics Technology Letters.

[55]  Frank Bucholtz,et al.  Performance of 16-channel, photonic, phased-array antenna calibration system , 2009 .

[56]  A. Dandridge,et al.  Suppression of double Rayleigh scattering-induced excess noise in remotely interrogated fiber-optic interferometric sensors , 2003, IEEE Photonics Technology Letters.

[57]  F. Bucholtz,et al.  RF Characterization of Zero-Biased Photodiodes , 2008, Journal of Lightwave Technology.

[58]  K. Rottwitt,et al.  Raman Amplification in Lightwave Communication Systems , 2002 .

[59]  Weimin Zhou,et al.  Injection-locked dual opto-electronic oscillator with ultra-low phase noise and ultra-low spurious level , 2005, IEEE Transactions on Microwave Theory and Techniques.

[60]  Steven White Implementation of a photonic automatic gain control system for correcting gain variations in the Green Bank Telescope fiber optic system , 2000 .

[61]  Thomas E. Darcie,et al.  Phase-Modulated Microwave-Photonic Link With Optical-Phase-Locked-Loop Enhanced Interferometric Phase Detection , 2008, Journal of Lightwave Technology.

[62]  T.E. Darcie,et al.  Class-AB techniques for high-dynamic-range microwave-photonic links , 2006, IEEE Photonics Technology Letters.

[63]  Andrew M. Weiner,et al.  High-power narrow-band terahertz generation using large-aperture photoconductors , 1999 .

[64]  Robert A. Minasian,et al.  Photonic signal processing of microwave signals , 2006 .

[65]  Hai-Han Lu Performance comparison between DCF and RDF dispersion compensation in fiber optical CATV systems , 2002, IEEE Trans. Broadcast..

[66]  H.V. Roussell,et al.  RF-Over-Fiber Links With Very Low Noise Figure , 2008, Journal of Lightwave Technology.

[67]  B. Ortega,et al.  A tutorial on microwave photonic filters , 2006, Journal of Lightwave Technology.

[68]  Suwat Thaniyavarn,et al.  Optical carrier filtering for high dynamic range fibre optic links , 1994 .

[69]  N. Olsson Lightwave systems with optical amplifiers , 1989 .

[71]  R. Tkach,et al.  Phase noise and linewidth in an InGaAsP DFB laser , 1986 .

[72]  C. Menyuk,et al.  Interaction of polarization mode dispersion and nonlinearity in optical fiber transmission systems , 2006, Journal of Lightwave Technology.

[73]  Michael J. Connelly,et al.  Semiconductor Optical Amplifiers , 2002 .

[74]  M. J. Garde,et al.  Single-sideband suppressed-carrier modulation using a single-electrode electrooptic modulator , 2001, IEEE Photonics Technology Letters.

[75]  H. Haus Electromagnetic Noise and Quantum Optical Measurements , 2000 .

[76]  A. Ramaswamy,et al.  Linear Coherent Receiver based on a Broadband and Sampling Optical Phase-Locked Loop , 2007, Microwave Photonics, 2007 Interntional Topical Meeting on.

[77]  G. H. Smith,et al.  TECHNIQUE FOR OPTICAL SSB GENERATION TO OVERCOME DISPERSION PENALTIES IN FIBRE-RADIO SYSTEMS , 1997 .

[78]  Edward I. Ackerman,et al.  Broad-band linearization of a Mach-Zehnder electrooptic modulator , 1999, IMS 1999.

[79]  H. Schmuck Comparison of optical millimetre-wave system concepts with regard to chromatic dispersion , 1995 .

[80]  A.J. Seeds,et al.  High-Dynamic-Range Wireless-Over-Fiber Link Using Feedforward Linearization , 2007, Journal of Lightwave Technology.

[81]  P. Yu,et al.  Equivalent circuit analysis of harmonic distortions in photodiode , 1998, IEEE Photonics Technology Letters.

[82]  G. Meslener,et al.  Chromatic dispersion induced distortion of modulated monochromatic light employing direct detection , 1984 .

[83]  Alain Z. Shang,et al.  Stimulated Brillouin scattering in cascaded fibers of different Brillouin frequency shifts , 1993 .

[84]  Frank Bucholtz,et al.  Wideband (0.045-6.25 GHz) 40 km analogue fibre-optic link with ultra-high (>40 dB) all-photonic gain , 2006 .

[85]  P. Andrekson,et al.  Increase of the SBS threshold in a short highly nonlinear fiber by applying a temperature distribution , 2001 .

[86]  D. Dolfi,et al.  Experimental demonstration of a phased-array antenna optically controlled with phase and time delays. , 1996, Applied optics.

[87]  R. DeSalvo,et al.  A novel technique for double sideband suppressed carrier modulation of optical fields , 1995, IEEE Photonics Technology Letters.

[88]  Charles Howard Cox,et al.  Analog optical links , 2004 .

[89]  M. Tur,et al.  Polarization Mode Dispersion of Installed Fibers , 2006, Journal of Lightwave Technology.

[90]  N. A. Olsson,et al.  Cancellation of fiber loss by semiconductor laser pumped Brillouin amplification at 1.5 μm , 1986 .

[91]  J. Conradi,et al.  Optical single sideband transmission at 10 Gb/s using only electrical dispersion compensation , 1999 .

[92]  J.D. McKinney,et al.  Dispersion Limitations of Ultra-Wideband Wireless Links and Their Compensation Via Photonically Enabled Arbitrary Waveform Generation , 2008, IEEE Transactions on Microwave Theory and Techniques.

[93]  High-gain Brillouin amplification: an analytical approach. , 2006, Optics letters.

[94]  D.A. Tulchinsky,et al.  Nonlinear distortion and crosstalk in microwave fiber-radio links , 2002, 2002 IEEE MTT-S International Microwave Symposium Digest (Cat. No.02CH37278).

[95]  A. Gnauck,et al.  Linear microwave-domain dispersion compensation of 10-Gb/s signals using heterodyne detection , 2005, OFC/NFOEC Technical Digest. Optical Fiber Communication Conference, 2005..

[96]  D.A. Tulchinsky,et al.  Phase performance of an eight-channel wavelength-division-multiplexed analog-delay line , 2004, Journal of Lightwave Technology.

[97]  Paul A. Morton,et al.  SBS and MPI suppression in analogue systems with integrated electroabsorption modulator/DFB laser transmitters , 1996 .

[98]  A. Friesem,et al.  Stimulated Brillouin scattering excited by a modulated pump wave in single-mode fibers , 1989 .

[99]  J. Capmany,et al.  Discrete-time optical Processing of microwave signals , 2005, Journal of Lightwave Technology.

[100]  A. Karim,et al.  Low Noise Figure Microwave Photonic Link , 2007, 2007 IEEE/MTT-S International Microwave Symposium.

[101]  J. McKinney,et al.  Photonic Synthesis of Ultrabroadband Arbitrary Electromagnetic Waveforms , 2006 .

[102]  M.J. LaGasse,et al.  Bias-free high-dynamic-range phase-modulated fiber-optic link , 1997, IEEE Photonics Technology Letters.

[103]  H. Baltes,et al.  High accuracy modeling of photodiode quantum efficiency. , 1989, Applied optics.

[104]  P.S. Devgan,et al.  Suppression of Even-Order Photodiode Nonlinearities in Multioctave Photonic Links , 2008, Journal of Lightwave Technology.

[105]  P. Yu,et al.  The frequency behavior of the third-order intercept point in a waveguide photodiode , 2000, IEEE Photonics Technology Letters.

[106]  R. D. Esman,et al.  Brillouin scattering: beyond threshold , 1996, Optical Fiber Communications, OFC..

[107]  Stephen A. Pappert,et al.  Microwave fiber optic links for shipboard antenna applications , 2000, Proceedings 2000 IEEE International Conference on Phased Array Systems and Technology (Cat. No.00TH8510).

[108]  C. Kittel Introduction to solid state physics , 1954 .

[109]  F. Bucholtz,et al.  Optically-Amplified Short-Length Analog Photonic Links , 2006, 2006 International Topical Meeting on Microwave Photonics.

[110]  M. Tateda,et al.  SBS threshold of a fiber with a Brillouin frequency shift distribution , 1996 .

[111]  K. Williams,et al.  Photodiode linearity requirements for radio-frequency photonics and demonstration of increased performance using photodiode arrays , 2008, 2008 International Topical Meeting on Microwave Photonics jointly held with the 2008 Asia-Pacific Microwave Photonics Conference.

[112]  A Yariv,et al.  Laser phase noise to intensity noise conversion by lowest-order group-velocity dispersion in optical fiber: exact theory. , 2000, Optics letters.

[113]  Dalma Novak,et al.  Hybrid Fiber Radio: Concepts and Prospects , 2013 .

[114]  S. LaRochelle,et al.  Erbium Amplifier Dynamics in Wireless Analog Optical Links With Modulator Bias Optimization , 2007, IEEE Photonics Technology Letters.

[115]  T.E. Murphy,et al.  Dual-Wavelength Linearization of Optically Phase-Modulated Analog Microwave Signals , 2008, Journal of Lightwave Technology.

[116]  Thomas Edward Darcie,et al.  Chapter 14 – Lightwave Analog Video Transmission , 1997 .

[117]  K. Williams,et al.  Even-order harmonic cancellation for off-quadrature biased Mach-Zehnder modulator with improved RF metrics using dual wavelength inputs and dual outputs. , 2009, Optics express.

[118]  Photodiode nonlinearity measurement using a linearized phase-modulated optical link , 2008, LEOS 2008 - 21st Annual Meeting of the IEEE Lasers and Electro-Optics Society.

[119]  Frank Bucholtz,et al.  Modulation Diversity for Chromatic Dispersion Compensation in Analog Photonic Links , 2006 .

[120]  Govind P. Agrawal,et al.  Nonlinear Fiber Optics , 1989 .

[121]  G.E. Betts,et al.  Limits on the performance of RF-over-fiber links and their impact on device design , 2006, IEEE Transactions on Microwave Theory and Techniques.

[122]  H. Haus,et al.  The noise figure of optical amplifiers , 1998, IEEE Photonics Technology Letters.

[123]  R. M. Derosier,et al.  Stimulated Brillouin threshold dependence on fiber type and uniformity , 1991, IEEE Photonics Technology Letters.

[124]  F. Bucholtz,et al.  The performance of analog photonic links employing highly compressed erbium-doped fiber amplifiers , 2006, IEEE Transactions on Microwave Theory and Techniques.

[125]  M. O'Mahony Semiconductor laser optical amplifiers for use in future fiber systems , 1988 .

[126]  Frank Bucholtz,et al.  Channelisation of radio-frequency signals using optoelectronic oscillator , 2009 .

[127]  Don Becker,et al.  GRIN Lens Coupled Top-Illuminated Highly Linear InGaAs Photodiodes , 2008, IEEE Photonics Technology Letters.

[128]  D. Pozar Microwave Engineering , 1990 .

[129]  W. Habicht,et al.  The advanced multifunction RF concept , 2005, IEEE Transactions on Microwave Theory and Techniques.

[130]  A. Chraplyvy Limitations on lightwave communications imposed by optical-fiber nonlinearities , 1990 .

[131]  A. C. Lindsay An analysis of coherent carrier suppression techniques for photonic microwave links , 1999 .

[132]  G. Lutes,et al.  A high-speed photonic clock and carrier recovery device , 1996, IEEE Photonics Technology Letters.

[133]  F. Bucholtz,et al.  Compensation of arbitrary chromatic dispersion in analog links using a modulation-diversity receiver , 2005, IEEE Photonics Technology Letters.

[134]  Jae-Jeong Eun,et al.  Class-B Microwave-Photonic Link Using Optical Frequency Modulation and Linear Frequency Discriminators , 2007, Journal of Lightwave Technology.

[135]  D. A. Wilbur Thermal Agitation of Electricity in Conductors. , 1932 .

[137]  A. B. Ruffin,et al.  Brillouin gain analysis for fibers with different refractive indices. , 2005, Optics letters.

[138]  T.E. Darcie,et al.  Analysis of a Class-B Microwave-Photonic Link Using Optical Frequency Modulation , 2008, Journal of Lightwave Technology.

[139]  S. LaRochelle,et al.  Carrier-to-noise ratio optimization by modulator bias control in radio-over-fiber links , 2006, IEEE Photonics Technology Letters.

[140]  L. Maleki,et al.  Optoelectronic microwave oscillator , 1996 .

[141]  J. M. Fuster,et al.  General expressions for IM/DD dispersive analog optical links with external modulation or optical up-conversion in a Mach-Zehnder electrooptical modulator , 2001 .

[142]  J.E. Bowers,et al.  Integrated Coherent Receivers for High-Linearity Microwave Photonic Links , 2008, Journal of Lightwave Technology.

[143]  F. Bucholtz,et al.  Analysis of interchannel crosstalk in a dispersion-managed analog transmission link , 2006, Journal of Lightwave Technology.

[144]  J.C. Campbell,et al.  Gain, Noise Figure and Bandwidth-Limited Dynamic Range of a Low-Biased External Modulation Link , 2007, Microwave Photonics, 2007 Interntional Topical Meeting on.

[145]  J. Bromage,et al.  Raman amplification for fiber communications systems , 2003, Journal of Lightwave Technology.

[146]  M.R. Phillips,et al.  Crosstalk due to optical fiber nonlinearity in WDM CATV lightwave systems , 1999, OFC/IOOC . Technical Digest. Optical Fiber Communication Conference, 1999, and the International Conference on Integrated Optics and Optical Fiber Communication.

[147]  Frank Bucholtz,et al.  Chromatic dispersion effects in analog polarization-modulated links. , 2006, Applied optics.

[148]  Keith J. Williams,et al.  Nonlinear mechanisms in microwave photodetectors operated with high intrinsic region electric fields , 1994 .

[149]  M. E. Fermann,et al.  Fabrication and characterization of low-loss optical fibers containing rare-earth ions , 1986 .

[150]  G. A. Watson A treatise on the theory of Bessel functions , 1944 .

[151]  N. Olsson,et al.  Erbium-Doped Fiber Amplifiers: Fundamentals and Technology , 1999 .

[152]  Jay N. Damask,et al.  Polarization Optics in Telecommunications , 2004 .

[153]  K. Williams,et al.  Long-haul microwave analog link with shot-noise-limited performance above the Stimulated Brillouin Scattering threshold , 2008, 2008 International Topical Meeting on Microwave Photonics jointly held with the 2008 Asia-Pacific Microwave Photonics Conference.

[154]  K. Williams,et al.  Nonlinearities in p-i-n microwave photodetectors , 1996 .

[155]  E. Desurvire,et al.  Erbium‐Doped Fiber Amplifiers: Principles and Applications , 1995 .

[156]  F. Bucholtz,et al.  Comparison of crosstalk in amplitude- and phase-modulated hyperfine WDM fiber optic links , 2005, (CLEO). Conference on Lasers and Electro-Optics, 2005..

[157]  R. Kalman,et al.  Dynamic range of coherent analog fiber-optic links , 1994 .

[158]  K. Williams,et al.  Phase Modulation With Interferometric Detection as an Alternative to Intensity Modulation With Direct Detection for Analog-Photonic Links , 2007, IEEE Transactions on Microwave Theory and Techniques.

[159]  P. Kirkpatrick,et al.  Electronic dispersion compensation for 10 Gigabit communication links over FDDI legacy multimode fiber , 2005, OFC/NFOEC Technical Digest. Optical Fiber Communication Conference, 2005..

[160]  K.J. Williams,et al.  Photodiode DC and microwave nonlinearity at high currents due to carrier recombination nonlinearities , 1998, IEEE Photonics Technology Letters.

[161]  D. Novak,et al.  Wideband Adaptive Feedforward Photonic Link , 2008, Journal of Lightwave Technology.

[162]  Hoon Kim,et al.  Chirp characteristics of dual-drive. Mach-Zehnder modulator with a finite DC extinction ratio , 2002, IEEE Photonics Technology Letters.

[163]  Henry Zmuda,et al.  Photonic Aspects of Modern Radar , 1994 .

[164]  S. Shen,et al.  Complete dispersion compensation for 400-fs pulse transmission over 10-km fiber link using dispersion compensating fiber and spectral phase equalizer , 1999, IEEE Photonics Technology Letters.

[165]  H. Sunnerud,et al.  Effects of Nonlinearities on PMD-Induced System Impairments , 2006, Journal of Lightwave Technology.

[166]  P.S. Devgan,et al.  Cascaded Noise Penalty for Amplified Long-Haul Analog Fiber-Optic Links , 2007, IEEE Transactions on Microwave Theory and Techniques.

[167]  P. J. Matthews,et al.  Fiber-optic true time steering of an ultrawide-band receive array , 1997 .

[168]  S. Forrest,et al.  Optically coherent direct modulated FM analog link with phase noise canceling circuit , 1999 .