Applied Physics Letters

2.5 W GaSb-based VECSEL at 2062.4 nm with an absolute wavelength stability below 1 MHz

P Peter Holl (Fraunhofer Institute for Applied Solid State Physics IAF 1 , Freiburg,) S Steffen Adler (Fraunhofer Institute for Applied Solid State Physics IAF 1 , Freiburg,) E Elke Diwo-Emmer (Fraunhofer Institute for Applied Solid State Physics IAF 1 , Freiburg,) A Andreas Bächle (Fraunhofer Institute for Applied Solid State Physics IAF 1 , Freiburg,) M Maximilian Bradler (Menlo Systems GmbH 2 , Bunsenstr. 5, D-82152 Martinsried,) M Milad Yahyapour (Menlo Systems GmbH 2 , Bunsenstr. 5, D-82152 Martinsried,) R Ronald Holzwarth (Menlo Systems GmbH 2 , Bunsenstr. 5, D-82152 Martinsried,) M Marlon Schäfer C Christoph Becher M Marcel Rattunde (Fraunhofer Institute for Applied Solid State Physics IAF 1 , Freiburg,)

Abstract

We present a GaSb-based vertical-external-cavity surface-emitting laser (VECSEL) tailored as a low-noise pump source for quantum frequency conversion. The 2062.4 nm emitting VECSEL emits a single-frequency output power of 2.5 W in a linear cavity with an intracavity birefringent filter. With no additional means of wavelength stabilization, the emission wavelength drift over 15 hours was less than 7 pm after the initial thermalization period. After locking the VECSEL to a frequency comb, the beating frequency between the laser and the comb light was characterized. The measurement confirmed a linewidth of less than 350 kHz (FWHM), and the absolute wavelength deviation over 22 hours had a standard deviation of 103.6 kHz. Relative intensity noise (RIN) measurements showed an integrated RIN of 0.15% root mean squared (RMS).

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Article Details

Volume / Issue Vol. 127, Issue 16
Published October 20, 2025
ISSN 0003-6951
Publisher American Institute of Physics

Journal Info

Applied Physics Letters

American Institute of Physics
ISSN: 0003-6951 Physical Sciences

Authors (10)

P

Peter Holl

Fraunhofer Institute for Applied Solid State Physics IAF 1 , Freiburg,

S

Steffen Adler

Fraunhofer Institute for Applied Solid State Physics IAF 1 , Freiburg,

E

Elke Diwo-Emmer

Fraunhofer Institute for Applied Solid State Physics IAF 1 , Freiburg,

A

Andreas Bächle

Fraunhofer Institute for Applied Solid State Physics IAF 1 , Freiburg,

M

Maximilian Bradler

Menlo Systems GmbH 2 , Bunsenstr. 5, D-82152 Martinsried,

M

Milad Yahyapour

Menlo Systems GmbH 2 , Bunsenstr. 5, D-82152 Martinsried,

R

Ronald Holzwarth

Menlo Systems GmbH 2 , Bunsenstr. 5, D-82152 Martinsried,

M

Marlon Schäfer

C

Christoph Becher

M

Marcel Rattunde

Fraunhofer Institute for Applied Solid State Physics IAF 1 , Freiburg,

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