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9 March 2020 Polarization-stable 940nm VCSELs for sparing (Conference Presentation)
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We demonstrate multimode 940 nm flip chip VCSELs with >20dB polarization suppression and small signal modulation bandwidth > 25 GHz (3dB) in 2x4 arrays for 50 Gbit/s/channel NRZ transmission. The VCSELs have surface gratings for polarization suppression. The high bandwidth operation is achieved in part by using a relatively small oxide aperture. The arrays are comprised of pairs of VCSELs with orthogonal polarizations, which enable cold sparing; if a primary (P-polarized) VCSEL fails, a system turns on a secondary (S-polarized) VCSEL. The light beam is routed through optics to the same 50 μm core fiber for both polarizations thus keeping the link integrity intact.
Conference Presentation
© (2020) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Petter Westbergh, Sonia Quadery, Haiquan Yang, Hao Chen, Frank Flens, Richard Chan, Tsurugi Sudo, and Dan Kuchta "Polarization-stable 940nm VCSELs for sparing (Conference Presentation)", Proc. SPIE 11300, Vertical-Cavity Surface-Emitting Lasers XXIV, 113000D (9 March 2020);

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