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Title: Laterally coupled distributed feedback type-I quantum well cascade diode lasers emitting near 3.22 μm

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.
Authors:
ORCiD logo [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [2] ;  [1]
  1. Stony Brook Univ., NY (United States). Electrical and Computer Engineering
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Report Number(s):
BNL-203316-2018-JAAM
Journal ID: ISSN 1559-128X
Grant/Contract Number:
SC0012704; ECCS-1408126; W911NF1110109
Type:
Accepted Manuscript
Journal Name:
Applied Optics
Additional Journal Information:
Journal Volume: 56; Journal Issue: 31; Journal ID: ISSN 1559-128X
Publisher:
Optical Society of America
Research Org:
Stony Brook Univ., NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF); US Army Research Office (ARO); China Scholarship Council (CSC)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; infrared and far-infrared lasers; semiconductor lasers; distributed-feedback lasers
OSTI Identifier:
1425098
Alternate Identifier(s):
OSTI ID: 1399819

Feng, Tao, Hosoda, Takashi, Shterengas, Leon, Kipshidze, Gela, Stein, Aaron, Lu, Ming, and Belenky, Gregory. Laterally coupled distributed feedback type-I quantum well cascade diode lasers emitting near 3.22 μm. United States: N. p., Web. doi:10.1364/AO.56.000H74.
Feng, Tao, Hosoda, Takashi, Shterengas, Leon, Kipshidze, Gela, Stein, Aaron, Lu, Ming, & Belenky, Gregory. Laterally coupled distributed feedback type-I quantum well cascade diode lasers emitting near 3.22 μm. United States. doi:10.1364/AO.56.000H74.
Feng, Tao, Hosoda, Takashi, Shterengas, Leon, Kipshidze, Gela, Stein, Aaron, Lu, Ming, and Belenky, Gregory. 2017. "Laterally coupled distributed feedback type-I quantum well cascade diode lasers emitting near 3.22 μm". United States. doi:10.1364/AO.56.000H74. https://www.osti.gov/servlets/purl/1425098.
@article{osti_1425098,
title = {Laterally coupled distributed feedback type-I quantum well cascade diode lasers emitting near 3.22 μm},
author = {Feng, Tao and Hosoda, Takashi and Shterengas, Leon and Kipshidze, Gela and Stein, Aaron and Lu, Ming and Belenky, Gregory},
abstractNote = {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.},
doi = {10.1364/AO.56.000H74},
journal = {Applied Optics},
number = 31,
volume = 56,
place = {United States},
year = {2017},
month = {10}
}