Wavelength stabilized external cavity diode laser at 461 nm in hermetic 14-pin butterfly package

Daniel Brauda; Dennis Krug; Moritz von Sivers; Hendrick Thiem; Markus Schütz; Alexander Bachmann; Miroslawa Malach; Björn Globisch

doi:10.1117/12.3002299

12 March 2024 Wavelength stabilized external cavity diode laser at 461 nm in hermetic 14-pin butterfly package

Daniel Brauda, Dennis Krug, Moritz von Sivers, Hendrick Thiem, Markus Schütz, Alexander Bachmann, Miroslawa Malach, Björn Globisch

Author Affiliations +

Proceedings Volume 12866, Components and Packaging for Laser Systems X; 128660D (2024) https://doi.org/10.1117/12.3002299
Event: SPIE LASE, 2024, San Francisco, California, United States

Abstract

We report on an External Cavity Diode Laser (ECDL) in a hermetically sealed 14-pin butterfly package with a collimated output beam. The laser emits more than 50 mW at a drive current of 165 mA and the emission wavelength can be tuned between 460.74 nm and 460.97 nm. The maximum mode-hop-free tuning range measures 26 GHz. The laser consists of a GaN-based gain chip, which is collimated by an aspheric lens. Behind the lens, a Volume Bragg Grating (VBG) stabilizes the laser emission to the target wavelength of around 460.8 nm, which can therefore be used for laser cooling or trapping of strontium without the need for frequency-doubling. Inside the butterfly package, the laser diode is soldered on a ceramic submount and mounted on an optical work bench together with the aspheric lens and the VBG. The optical work bench is temperature stabilized by a Thermoelectric Cooler (TEC) in combination with a thermistor. In frequency noise measurements of the packaged laser, we measured a white noise level of 1.29 MHz. This demonstrates a reasonable stabilization of the emission wavelength of the gain chip via the VBG. By further improvements of the ECDL we expect that a linewidth ⪅ 1 MHz can be achieved. This development paves the way for compact, blue laser diodes with a narrow linewidth for quantum technology, spectroscopy, and sensing.

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Citation Download Citation

Daniel Brauda, Dennis Krug, Moritz von Sivers, Hendrick Thiem, Markus Schütz, Alexander Bachmann, Miroslawa Malach, and Björn Globisch "Wavelength stabilized external cavity diode laser at 461 nm in hermetic 14-pin butterfly package", Proc. SPIE 12866, Components and Packaging for Laser Systems X, 128660D (12 March 2024); https://doi.org/10.1117/12.3002299

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