Flat, rectangular frequency comb generation with tunable bandwidth and frequency spacing.

The generation of flat, rectangular frequency combs with tunable frequency spacing and bandwidth is demonstrated. Therefore, several lines or sidebands are extracted out of an existing frequency comb, for example a femtosecond fiber laser. Subsequently, these lines are processed via two Mach-Zehnder modulators in order to generate a flat frequency comb with tunable frequency spacing. Optical frequency combs with various spacing and a maximum bandwidth of 260 GHz are generated. However, much higher bandwidth can be reached easily. The overall flatness of the generated combs is within 0.6 dB.

[1]  T. Schneider,et al.  Bandwidth reduction in a multistage Brillouin system. , 2012, Optics letters.

[2]  C. Brès,et al.  Optical sinc-shaped Nyquist pulses of exceptional quality , 2013, Nature Communications.

[3]  Rui Wu,et al.  Generation of very flat optical frequency combs from continuous-wave lasers using cascaded intensity and phase modulators driven by tailored radio frequency waveforms. , 2010, Optics letters.

[4]  Dongsun Seo,et al.  Reconfigurable and Tunable Flat-Top Microwave Photonic Filters Utilizing Optical Frequency Combs , 2011, IEEE Photonics Technology Letters.

[5]  A. Weiner,et al.  Comb-based radiofrequency photonic filters with rapid tunability and high selectivity , 2011, Nature Photonics.

[6]  R. Braun,et al.  Generation of ultra-narrow, stable and tunable millimeter- and terahertz- waves with very low phase noise. , 2013, Optics express.

[7]  T. Schneider,et al.  Brillouin scattering gain bandwidth reduction down to 3.4MHz. , 2011, Optics express.

[8]  M. Takamoto,et al.  An optical lattice clock , 2005, Nature.

[9]  Ronny Henker,et al.  Quasi-Light-Storage based on time-frequency coherence. , 2009, Optics express.

[10]  M. Tur,et al.  Sharp tunable optical filters based on the polarization attributes of stimulated Brillouin scattering. , 2011, Optics express.

[11]  Moshe Tur,et al.  Vector analysis of stimulated Brillouin scattering amplification in standard single-mode fibers. , 2008, Optics express.

[12]  Thomas Schneider,et al.  Quasi-Light Storage: A Method for the Tunable Storage of Optical Packets With a Potential Delay-Bandwidth Product of Several Thousand Bits , 2010, Journal of Lightwave Technology.

[13]  Jun Ye,et al.  Optical frequency combs: from frequency metrology to optical phase control , 2003 .

[14]  Andrew M. Weiner,et al.  Tunable Programmable Microwave Photonic Filters Based on an Optical Frequency Comb , 2010 .

[15]  M. Tur,et al.  Enhancement of spectral resolution and optical rejection ratio of Brillouin optical spectral analysis using polarization pulling. , 2012, Optics express.

[16]  H. Haus.  Mode-locking of lasers , 2000, IEEE Journal of Selected Topics in Quantum Electronics.