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17 March 2023 Membrane external-cavity surface-emitting laser emitting in bi-frequency operation through micromachining of cavity mirror
Jake Daykin, Jonathan R. C. Woods, Daniel Heath, Roman Bek, James S. Wilkinson, Ben Mills, Michael Jetter, Peter Michler, Vasilis Apostolopoulos
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Proceedings Volume 12404, Vertical External Cavity Surface Emitting Lasers (VECSELs) XII; 1240403 (2023) https://doi.org/10.1117/12.2647363
Event: SPIE LASE, 2023, San Francisco, California, United States
Abstract
We present continuous wave bi-frequency operation in an optically pumped membrane external-cavity surface-emitting laser (MECSEL). A laser ablation system utilising a digital micromirror device is used to define areas of intra-cavity loss by removing Bragg layers from the surface of the cavity mirror in a crosshair pattern with an undamaged central area. Our MECSEL simultaneously operates on two Hermite-Gaussian spatial modes, the fundamental and a higher order mode, by aligning the laser cavity to be centred on a masked area. We demonstrate bi-frequency operation with a wavelength separation on the order of 5 nm around 1005 nm.
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Jake Daykin, Jonathan R. C. Woods, Daniel Heath, Roman Bek, James S. Wilkinson, Ben Mills, Michael Jetter, Peter Michler, and Vasilis Apostolopoulos "Membrane external-cavity surface-emitting laser emitting in bi-frequency operation through micromachining of cavity mirror", Proc. SPIE 12404, Vertical External Cavity Surface Emitting Lasers (VECSELs) XII, 1240403 (17 March 2023); https://doi.org/10.1117/12.2647363
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KEYWORDS
Mirrors
Micromachining
Continuous wave operation
Laser ablation
Terahertz spectroscopy
Optical pumping
Optical sensing
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