Room-temperature, directly modulated DFB-QCLs and resonant-cavity infrared detectors (RCIDs) for 5 Gb/s OOK free-space, mid-wave infrared atmospheric laser communication

R. Marsland; M. Turville-Heitz; J.-H. Ryu; C. L. Canedy; I. Vurgaftman; V. Jayaraman; T. Earles; S. Ruder; B. Knipfer; J. R. Meyer; D. Botez; L. J. Mawst

doi:10.1117/12.3001038

13 March 2024 Room-temperature, directly modulated DFB-QCLs and resonant-cavity infrared detectors (RCIDs) for 5 Gb/s OOK free-space, mid-wave infrared atmospheric laser communication

R. Marsland, M. Turville-Heitz, J.-H. Ryu, C. L. Canedy, I. Vurgaftman, V. Jayaraman, T. Earles, S. Ruder, B. Knipfer, J. R. Meyer, D. Botez, L. J. Mawst

Author Affiliations +

Proceedings Volume 12877, Free-Space Laser Communications XXXVI; 128770F (2024) https://doi.org/10.1117/12.3001038
Event: SPIE LASE, 2024, San Francisco, California, United States

Abstract

We present results and analysis of 5 Gb/s On-Off-Keyed (OOK) data transmission at ~ 4.6-micron wavelength using, at room temperature, a directly modulated, single-mode DFB-QCL transmitter and a Resonant-Cavity Infrared Detector (RCID) receiver. The DFB-QCL design enables relatively high 165-mW CW output power. We used a 3-mm device with ~ 4-micron aperture for stable single-spatial-mode operation, operating at 65 mW. The RCID detector suppresses background radiation while providing enhanced quantum efficiency, ~ 60%, with low polarization dependence and low dark current at room temperature. The data transmission was achieved with no transmitter pulse shaping, consistent with lower-cost transceiver implementation.

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Citation Download Citation

R. Marsland, M. Turville-Heitz, J.-H. Ryu, C. L. Canedy, I. Vurgaftman, V. Jayaraman, T. Earles, S. Ruder, B. Knipfer, J. R. Meyer, D. Botez, and L. J. Mawst "Room-temperature, directly modulated DFB-QCLs and resonant-cavity infrared detectors (RCIDs) for 5 Gb/s OOK free-space, mid-wave infrared atmospheric laser communication", Proc. SPIE 12877, Free-Space Laser Communications XXXVI, 128770F (13 March 2024); https://doi.org/10.1117/12.3001038

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