Laterally coupled distributed feedback type-I quantum well cascade diode lasers emitting near 3.22 μm
- Stony Brook Univ., NY (United States). Electrical and Computer Engineering
- Brookhaven National Lab. (BNL), Upton, NY (United States)
The laterally coupled distributed feedback (LC-DFB) GaSb-based type-I quantum well cascade diode lasers using the second- and the sixth-order gratings to stabilize the output spectrum near 3.22 μm were designed and fabricated in this paper. The laser heterostructure contained three cascades. The devices were manufactured using a single dry etching step defining the ~5-μm-wide ridge with ~5-μm-wide gratings sections adjacent to the ridge sides. The grating coupling coefficients were estimated to be about 1 cm-1. The stability of the single-frequency operation was ensured by alignment of the DFB mode to the relatively wide gain peak. The 2-mm-long second-order LC-DFB lasers generated above 10 mW of continuous-wave (CW) output power at 20°C in epi-side-up configuration and demonstrated power conversion efficiency above 2%. The sixth-order LC-DFB lasers showed lower efficiency but still generated several milliwatts of CW output power. Finally, the devices demonstrated a CW current tuning range of about 3.5 nm at the temperature of 20°C.
- Research Organization:
- Stony Brook Univ., NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); US Army Research Office (ARO); China Scholarship Council (CSC)
- Grant/Contract Number:
- SC0012704; ECCS-1408126; W911NF1110109
- OSTI ID:
- 1425098
- Alternate ID(s):
- OSTI ID: 1399819
- Report Number(s):
- BNL-203316-2018-JAAM
- Journal Information:
- Applied Optics, Vol. 56, Issue 31; ISSN 1559-128X
- Publisher:
- Optical Society of AmericaCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
3 μ m InAs quantum well lasers at room temperature on InP
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journal | December 2018 |
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