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- W3123014785 abstract "Lasing emission at multiple wavelengths can be used in different sensing applications and in optical telecommunication. In this work, we report a six-wavelength distributed Bragg reflector (DBR) laser, emitting around 976 nm with six ridge waveguide (RW) structures, where individual DBR gratings are combined into a common front section. These six elements are individually addressable and biased one at a time for individual wavelength selection. The drawback of this RW combination is observable in spatial characteristics where higher-order modes are supported. We addressed this issue by using a master oscillator power amplifier (MOPA) system that combines the six-wavelength MO laser with a tapered PA. Through this configuration, the PA acts as a spatial filter of the MO beam, providing a nearly diffraction-limited beam with <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline> <mml:msubsup> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mi>M</mml:mi> </mml:mrow> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mn>1</mml:mn> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mo>/</mml:mo> </mml:mrow> <mml:mrow class=MJX-TeXAtom-ORD> <mml:msup> <mml:mi>e</mml:mi> <mml:mn>2</mml:mn> </mml:msup> </mml:mrow> </mml:mrow> <mml:mn>2</mml:mn> </mml:msubsup> <mml:mspace width=thickmathspace /> <mml:mo><<!-- < --></mml:mo> <mml:mspace width=thickmathspace /> <mml:mrow class=MJX-TeXAtom-ORD> <mml:mn>1.5</mml:mn> </mml:mrow> </mml:math> . In addition, the described MOPA system provides output powers around 4 W with spectral single-mode operation, with up to 9.36 nm of thermal wavelength tuning. We believe that the described MOPA configuration can be used in different applications, such as absorption spectroscopy." @default.
- W3123014785 created "2021-02-01" @default.
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- W3123014785 date "2021-02-24" @default.
- W3123014785 modified "2023-09-27" @default.
- W3123014785 title "Spatial filtering of a six-wavelength DBR-RW laser in a MOPA system" @default.
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- W3123014785 doi "https://doi.org/10.1364/ao.414883" @default.
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