Higher-order QAM data transmission using a high-coherence hybrid Si/III–V semiconductor laser
Abstract
We experimentally demonstrate the use of a high-coherence hybrid silicon (Si)/III–V semiconductor laser as the light source for a transmitter generating 20 Gbaud 16- and 64- quadrature amplitude modulated (QAM) data signals over an 80 km single-mode fiber (SMF) link. The hybrid Si/III–V laser has a measured Schawlow–Townes linewidth of ∼10kHz, which is achieved by storing modal optical energy in low-loss Si, rather than the relatively lossy III–V materials. We measure a received bit error rate (BER) of 4.1×10⁻³ when transmitting the 64-QAM data over an 80 km SMF using the hybrid Si/III–V laser. Furthermore, we measure a BER of <1×10⁻⁴ with the Viterbi–Viterbi digital carrier phase recovery method when transmitting the 16-QAM data over an 80 km SMF using the hybrid Si/III–V laser. This performance is achieved at power penalties lower than those obtained with an exemplary distributed feedback laser and slightly higher than those with an exemplary narrow-linewidth external cavity laser.
Additional Information
© 2020 Optical Society of America. Received 19 November 2019; revised 2 February 2020; accepted 4 February 2020; posted 13 February 2020 (Doc. ID 383137); published 11 March 2020. We would like to acknowledge the technical and fabrication infrastructure support from the Kavli Nanoscience Institute at the California Institute of Technology. Funding: National Science Foundation (Y501119); Defense Advanced Research Projects Agency (N66001-14-1-4062); Army Research Office (W911NF-14-P-0020, W911NF-16-C-0026). The authors declare no conflicts of interest.Additional details
- Eprint ID
- 102583
- Resolver ID
- CaltechAUTHORS:20200416-133807071
- NSF
- Y501119
- Defense Advanced Research Projects Agency (DARPA)
- N66001-14-1-4062
- Army Research Office (ARO)
- W911NF-14-P-0020
- Army Research Office (ARO)
- W911NF-16-C-0026
- Created
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2020-04-16Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field
- Caltech groups
- Kavli Nanoscience Institute