VCSEL-Based Optical Frequency Combs: Expansion of the Optical Span under Arbitrary Polarized Optical Injection

We report on a theoretical study of the optical frequency combs (OFCs) generated by Gain-Switching Vertical-Cavity Surface-Emitting Lasers (VCSELs) under arbitrary polarized optical injection (OI). Our results show that two orthogonally polarized sub-combs are obtained generating a wider overall optical comb for a certain angle between the linearly polarized optical injection and the direction of emission of the free-running VCSEL. This angle decreases as the injection strength increases. A characterization of the maximum expansion of the optical span of the overall comb has also been reported.Moreover, we have analysed the effect of the birefringence of the VCSEL in the expansion of the overall comb. We found that for VCSELs with large birefringence splitting, the maximum frequency enhancement is the optical span of the free-running comb, while for small birefringence splitting the maximum frequency enhancement is the birefringence splitting value.

[1]  I. Coddington,et al.  Dual-comb spectroscopy. , 2016, Optica.

[2]  Nathan R. Newbury,et al.  Searching for applications with a fine-tooth comb , 2011 .

[3]  Muhammad Imran,et al.  A Survey of Optical Carrier Generation Techniques for Terabit Capacity Elastic Optical Networks , 2018, IEEE Communications Surveys & Tutorials.

[4]  P. Acedo,et al.  Dynamics of dual-polarization VCSEL-based optical frequency combs under optical injection locking. , 2016, Optics letters.

[5]  Mario Dagenais,et al.  Optical injection induced polarization bistability in vertical‐cavity surface‐emitting lasers , 1993 .

[6]  H. Lu,et al.  Continuous-Wave Sub-THz Photonic Generation With Ultra-Narrow Linewidth, Ultra-High Resolution, Full Frequency Range Coverage and High Long-Term Frequency Stability , 2013, IEEE Transactions on Terahertz Science and Technology.

[7]  Pablo Acedo,et al.  Understanding VCSEL-Based Gain Switching Optical Frequency Combs: Experimental Study of Polarization Dynamics , 2015, Journal of Lightwave Technology.

[8]  ANA QUIRCE,et al.  Polarization switching and injection locking in vertical-cavity surface-emitting lasers subject to parallel optical injection. , 2016, Optics letters.

[9]  M. J. Adams,et al.  Dynamics of VCSELs Subject to Optical Injection of Arbitrary Polarization , 2013, IEEE Journal of Selected Topics in Quantum Electronics.

[10]  Pablo Acedo,et al.  VCSEL-Based Optical Frequency Combs Expansion Induced by Polarized Optical Injection , 2019, IEEE Journal of Selected Topics in Quantum Electronics.