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- W4312208291 abstract "GaSb-based narrow Ridge Waveguide (RW) laser diodes providing high optical power with low lateral beam divergence single-transverse-mode operation are fabricated and characterized. The typical Separate-Confinement-Heterostructure (SCH) Multi-Quantum-Well (MQW) structure is grown by the solid-state Molecular Beam Epitaxy (MBE). The 1 mm long uncoated RW lasers yield single-transverse-mode output power exceeding 170 mW in the 1950 nm wavelength range under continuous-wave (cw) operation at an injection current of 800 mA and room temperature of 20 ℃. The shallow-etched 7 μm width RW design produces a lateral beam divergence angle as narrow as 9° Full Width at Half Maximum (FWHM) with an excellent beam quality of M<sup>2 </sup>factor < 2 at the maximum output power, enabling it for simple and inexpensive bulk coupling into the typical SM1950 or PM1950 fiber which has a core diameter of 7 μm and numerical aperture (NA) of 0.2. The RW lasers with high output power, good beam quality, and low divergence are promising candidates for a wide range of demanding and advanced applications including pumping fiber amplifiers and solid-state lasers, seeding external cavity lasers, and frequency conversion." @default.
- W4312208291 created "2023-01-04" @default.
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- W4312208291 date "2022-12-27" @default.
- W4312208291 modified "2023-09-27" @default.
- W4312208291 title "Single transverse mode GaSb-based ridge waveguide lasers with low lateral beam divergence" @default.
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- W4312208291 doi "https://doi.org/10.1117/12.2643841" @default.
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