Spectral linewidth of a free-running continuous-wave single-frequency external-cavity quantum-well InGaAs/AlGaAs diode laser

Journal Article · Fri Sep 01 00:00:00 EDT 1995 · Optics Letters

DOI:https://doi.org/10.1364/OL.20.001788· OSTI ID:165582

Hsu, L; Mooradian, A; Aggarwal, R L ^[1]

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1. Lincoln Laboratory, Massachusetts Institute of Technology, Lexington, Massachusetts 02173-9108 (United States)

The linewidth of a room-temperature free-running 940-nm cw single-frequency 1-mm-long quantum-well InGaAs/AlGaAs diode laser in a 10-cm-long external cavity has been measured as a function of the output power by the heterodyne technique. The power-dependent component of the observed Lorentzian linewidth displays a linewidth--power product of 28{plus_minus}4kHz mW, which is 2 orders of magnitude larger than that predicted from the spontaneous emission model. The shot-noise model of Welford and Mooradian [Appl. Phys. Lett. {bold 40}, 560 (1982)] for the power-independent linewidth has been extended to account for the observed power-dependent linewidth. {copyright} 1995 Optical Society of America

• Sponsoring Organization: USDOE
• OSTI ID: 165582
• Journal Information: Optics Letters, Vol. 20, Issue 17; Other Information: PBD: 1 Sep 1995
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES
SEMICONDUCTOR LASERS
LINE WIDTHS
ALUMINIUM ARSENIDES
GALLIUM ARSENIDES
INDIUM ARSENIDES
NEAR INFRARED RADIATION