Phase-front measurements of an injection-locked AlGaAs laser-diode array

Journal Article · Fri Sep 01 00:00:00 EDT 1989 · Optics Letters; (USA)

DOI:https://doi.org/10.1364/OL.14.000910· OSTI ID:5552218

Cornwell, Jr, D M; Rall, J A.R.; Abshire, J B ^[1]

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1. NASA-Goddard Space Flight Center, Instrument Electro-Optics Branch, Code 723, Greenbelt, Maryland 20771 (US)

The phase-front quality of the primary spatial lobe emitted from an injection-locked gain-guided AlGaAs laser-diode array is measured by using an equal-path, phase-shifting Mach--Zehnder interferometer. Root-mean-square phase errors of 0.037{congruent}0.003 wave ({Sigma}/27) are measured for the single spatial lobe, which contained 240-mW cw output power in a single longitudinal mode. This phase-front quality corresponds to a Strehl ratio of {ital S}=0.947, which results in a 0.23-dB power loss from the single lobe's ideal diffraction-limited power. These values are comparable with those measured for single-stripe index-guided AlGaAs lasers.

• OSTI ID: 5552218
• Journal Information: Optics Letters; (USA), Journal Name: Optics Letters; (USA) Vol. 14:17; ISSN OPLED; ISSN 0146-9592
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
ALUMINIUM ARSENIDES
ALUMINIUM COMPOUNDS
ARSENIC COMPOUNDS
ARSENIDES
BEAM PROFILES
ELECTROMAGNETIC RADIATION
GALLIUM ARSENIDES
GALLIUM COMPOUNDS
LASER RADIATION
LASERS
LUMINOSITY
NOISE
OPTICAL PROPERTIES
PHASE SHIFT
PHYSICAL PROPERTIES
PNICTIDES
RADIATIONS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR LASERS
SOLID STATE LASERS