Passive mode-locking of 3.25um GaSb-based type-I quantum-well cascade diode lasers

Tao Feng; Leon Shterengas; Gela Kipshidze; Takashi Hosoda; Meng Wang; Gregory Belenky

doi:10.1117/12.2287463

19 February 2018 Passive mode-locking of 3.25μm GaSb-based type-I quantum-well cascade diode lasers

Tao Feng, Leon Shterengas, Gela Kipshidze, Takashi Hosoda, Meng Wang, Gregory Belenky

Proceedings Volume 10553, Novel In-Plane Semiconductor Lasers XVII; 1055319 (2018) https://doi.org/10.1117/12.2287463
Event: SPIE OPTO, 2018, San Francisco, California, United States

Abstract

Passively mode-locked type-I quantum well cascade diode lasers emitting in the methane absorption band near 3.25 μm were designed, fabricated and characterized. The deep etched ~5.5-μm-wide single spatial mode ridge waveguide design utilizing split-contact architecture was implemented. The devices with absorber to gain section length ratios of 11% and 5.5% were studied. Lasers with the longer absorber section (~300 μm) generated smooth bell-shape-like emission spectrum with about 30 lasing modes at full-width-at-half-maximum level. Devices with reverse biased absorber section demonstrated stable radio frequency beat with nearly perfect Lorentzian shape over four orders of magnitude of intensity. The estimated pulse-to-pulse timing jitter was about 110 fs/cycle. Laser generated average power of more than 1 mW in mode-locked regime.

Citation Download Citation

Tao Feng, Leon Shterengas, Gela Kipshidze, Takashi Hosoda, Meng Wang, and Gregory Belenky "Passive mode-locking of 3.25μm GaSb-based type-I quantum-well cascade diode lasers", Proc. SPIE 10553, Novel In-Plane Semiconductor Lasers XVII, 1055319 (19 February 2018); https://doi.org/10.1117/12.2287463

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