Slope efficiency and spurious-free dynamic range of silicon Mach-Zehnder modulator upon carrier depletion and injection effects.

We investigate the performances of a silicon PN-junction Mach-Zehnder modulator for analog application. The slope efficiency and spurious-free dynamic range (SFDR) of such a modulator upon carrier depletion and carrier injection effects are characterized and compared. Input RF frequency-dependence measurements show that the depletion-type modulator is usually with ~20 dB ∙ Hz(2/3) higher SFDR comparing to the injection-type modulator, yet with an order-of-magnitude lower slope efficiency. For the depletion-type and injection-type modulators, the measured maximum SFDRs are respectively ~95 dB ∙ Hz(2/3) and 75 dB∙Hz(2/3), with maximum slope efficiency of 0.3 V(-1) and 8 V(-1<). We numerically model the SFDR by using the experimentally extracted effective refractive index change, which shows good agreement with the measurements.

[1]  Characterization of silicon electro-optical modulators for microwave photonic links , 2011, 2011 International Topical Meeting on Microwave Photonics jointly held with the 2011 Asia-Pacific Microwave Photonics Conference.

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

[3]  David J. Thomson,et al.  Silicon optical modulators , 2010 .

[4]  Bin Liu,et al.  Analog characterization of low-voltage MQW traveling-wave electroabsorption modulators , 2003 .

[5]  Ling Liao,et al.  A Silicon Modulator Enabling RF Over Fiber for 802.11 OFDM Signals , 2010, IEEE Journal of Selected Topics in Quantum Electronics.

[6]  R. Soref,et al.  Electrooptical effects in silicon , 1987 .

[7]  Po Dong,et al.  High speed carrier-depletion modulators with 1.4V-cm V(pi)L integrated on 0.25microm silicon-on-insulator waveguides. , 2010, Optics express.

[8]  L. Sekaric,et al.  Ultra-compact, low RF power, 10 Gb/s silicon Mach-Zehnder modulator. , 2007, Optics express.

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

[10]  R. Soref,et al.  The Past, Present, and Future of Silicon Photonics , 2006, IEEE Journal of Selected Topics in Quantum Electronics.

[11]  Po Dong,et al.  High-speed low-voltage single-drive push-pull silicon Mach-Zehnder modulators. , 2012, Optics express.

[12]  Juthika Basak,et al.  40 Gbit/s silicon optical modulator for highspeed applications , 2007 .

[13]  Muping Song,et al.  Nonlinear Distortion in a Silicon Microring-Based Electro-Optic Modulator for Analog Optical Links , 2010, IEEE Journal of Selected Topics in Quantum Electronics.

[14]  Edward I. Ackerman,et al.  Limits on the performance of RF-over-fiber links and their impact on device design , 2006 .

[15]  Michael Hochberg,et al.  Linearity of silicon ring modulators for analog optical links. , 2012, Optics express.

[16]  B. Jalali,et al.  Silicon Photonics , 2006, Journal of Lightwave Technology.

[17]  Ling Liao,et al.  Silicon Optical Modulator for High-speed Applications , 2007, 2007 4th IEEE International Conference on Group IV Photonics.

[18]  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.

[19]  Mingbin Yu,et al.  Fabrication of low loss and high speed silicon optical modulator using doping compensation method. , 2011, Optics express.

[20]  P. Crozat,et al.  40 Gbit/s low-loss silicon optical modulator based on a pipin diode. , 2012, Optics express.