Two-step narrow ridge cascade diode lasers emitting near $2~\mu$ m

Feng, Tao; Hosoda, Takashi; Shterengas, Leon; Stein, Aaron; Kipshidze, Gela; Belenky, Gregory

doi:10.1109/LPT.2016.2647442

Two-step narrow ridge cascade diode lasers emitting near $$2~\mu$$ m

Journal Article · Sun Jan 01 23:00:00 EST 2017 · IEEE Photonics Technology Letters

DOI:https://doi.org/10.1109/LPT.2016.2647442· OSTI ID:1368667

^[1]; Hosoda, Takashi ^[1]; Shterengas, Leon ^[1]; Stein, Aaron ^[2]; Kipshidze, Gela ^[1]; Belenky, Gregory ^[1]

State Univ. of New York at Stony Brook, Stony Brook, NY (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)

Nearly diffraction limited GaSb-based type-I quantum well cascade diode lasers emitting in the spectral region 1.95-2 μm were designed and fabricated. Two-step 5.5-μm-wide shallow and 14-μm-wide deep etched ridge waveguide design yielded devices generating stable single lobe beams with 250 mW of continuous wave output power at 20 °C. Quantum well radiative recombination current contributes about 13% to laser threshold as estimated from true spontaneous emission and modal gain analysis. Here, recombination at etched sidewalls of the 14-μmwide deep ridges controls about 30% of the threshold.

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

OSTI ID:: 1368667

Report Number(s):: BNL--113990-2017-JA; KC0403020

Journal Information:: IEEE Photonics Technology Letters, Journal Name: IEEE Photonics Technology Letters Journal Issue: 6 Vol. 29; ISSN 1041-1135

Publisher:: IEEECopyright Statement

Country of Publication:: United States

Language:: English

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42 ENGINEERING
Center for Functional Nanomaterials
GaSb-based
cascade pumping
current density
diffraction limited beam
infrared
laser modes
measurement by laser beam
optical waveguides
quantum cascade lasers
type-I quantum well
waveguide lasers

Two-step narrow ridge cascade diode lasers emitting near $$2~\mu$$ m

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