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Proceedings Paper

Polarization-stable 940nm VCSELs for sparing (Conference Presentation)
Author(s): Petter Westbergh; Sonia Quadery; Haiquan Yang; Hao Chen; Frank Flens; Richard Chan; Tsurugi Sudo; Dan Kuchta

Paper Abstract

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.

Paper Details

Date Published: 9 March 2020
Proc. SPIE 11300, Vertical-Cavity Surface-Emitting Lasers XXIV, 113000D (9 March 2020); doi: 10.1117/12.2546951
Show Author Affiliations
Petter Westbergh, Finisar Corp. (United States)
Sonia Quadery, Finisar Corp. (United States)
Haiquan Yang, Finisar Corp. (United States)
Hao Chen, Finisar Corp. (United States)
Frank Flens, Finisar Corp. (United States)
Richard Chan, Finisar Corp. (United States)
Tsurugi Sudo, Finisar Corp. (United States)
Dan Kuchta, IBM Thomas J. Watson Research Ctr. (United States)

Published in SPIE Proceedings Vol. 11300:
Vertical-Cavity Surface-Emitting Lasers XXIV
Luke A. Graham; Chun Lei, Editor(s)

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