Spectral-broadness simulation of a Littman/Metcalf external cavity diode laser with a dynamic-curvature end mirror

Spectral-broadness simulation of a Littman/Metcalf external cavity diode laser with a dynamic-curvature end mirror

We propose a dynamic-spectral-broadness Littman/Metcalf external cavity diode laser, which replaces the flat end mirror of the external cavity with a curved one with a tunable radius of curvature (RoC). The concept was verified via simulation; first, the frequency selectivity of the cavity was calcu...

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Veröffentlicht in:Optics express 2023-08, Vol.31 (17), p.27123
Hauptverfasser: Kato, Naoaki, Takiguchi, Yu, Tanaka, Hiroshi, Ohtake, Yoshiyuki
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container_title Optics express
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creator Kato, Naoaki
Takiguchi, Yu
Tanaka, Hiroshi
Ohtake, Yoshiyuki
description We propose a dynamic-spectral-broadness Littman/Metcalf external cavity diode laser, which replaces the flat end mirror of the external cavity with a curved one with a tunable radius of curvature (RoC). The concept was verified via simulation; first, the frequency selectivity of the cavity was calculated for each RoC using Gaussian-beam optics combined with ray tracing, and second, laser oscillation and amplified spontaneous-emission (ASE) spectra were obtained using the transmission-line laser model. The simulation revealed a tuning range with spectral broadness: 250 kHz for single-mode operation, 1.2–47 GHz for multi-mode operation, and 50 GHz–3.9 THz for ASE.
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title Spectral-broadness simulation of a Littman/Metcalf external cavity diode laser with a dynamic-curvature end mirror
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