Tunable Narrowband Tm:YAP Laser using a Transversally Chirped Volume Bragg Grating

International audienceTunable long wave infrared (LWIR) coherent sources emitting between 8 and 12 μm can be used for versatile remote gas sensing. In ref [1] we implemented a parametric oscillator in which wavelength tunability was achieved by temperature tuning of the crystal indices of refraction. It is well known that a similar wavelength range can be addressed by tuning the pump wavelength rather than the crystal temperature [2]. In addition, pump tuning can be significantly faster than temperature tuning. In this context we also need a narrow band spectrum to control the spectral output of the optical parametric oscillator, which is based on Vernier spectral filtering in doubly-resonant cavities. Seger and his team exhibited single longitudinal mode operation in a microlaser tuned with transversally chirped volume Bragg grating (TC-VBG) near 1 μm [3]. We show how this concept can be applied to a different laser emitting at 2 μm

Tunable Narrowband Tm:YAP Laser using a Transversally Chirped Volume Bragg Grating

International audienceTunable long wave infrared (LWIR) coherent sources emitting between 8 and 12 μm can be used for versatile remote gas sensing. In ref [1] we implemented a parametric oscillator in which wavelength tunability was achieved by temperature tuning of the crystal indices of refraction. It is well known that a similar wavelength range can be addressed by tuning the pump wavelength rather than the crystal temperature [2]. In addition, pump tuning can be significantly faster than temperature tuning. In this context we also need a narrow band spectrum to control the spectral output of the optical parametric oscillator, which is based on Vernier spectral filtering in doubly-resonant cavities. Seger and his team exhibited single longitudinal mode operation in a microlaser tuned with transversally chirped volume Bragg grating (TC-VBG) near 1 μm [3]. We show how this concept can be applied to a different laser emitting at 2 μm

Actively Q-switched Tunable Narrowband 2 μm Tm:YAP Laser Using a Transversally Chirped Volume Bragg Grating

International audienceA pulsed, narrow-linewidth, wavelength-tunable Tm:YAP laser was realized. 1kHz stable operation with 200 μJ, 50ns pulses is reported. Spectrum was narrowed to 0.2nm and tuned from 1940 to 1960 nm with a transversally chirped volume Bragg grating

Cost effective laser structuration of optical waveguides on thin glass interposer

International audienceIn order to enhance electro-optical system-in-package capabilities for silicon photonics, a cost effective fabrication process for optical waveguides integration on thin glass substrate interposer is demonstrated. Firstly, a femtosecond laser ablation coupled with a hydrofluoric acid etching is developed to create micro grooves at the glass surface. Secondly, a dry film lamination followed by chemical mechanical planarization is achieved to define surface optical waveguides by filling the micro channels. Physical characterizations of the fabricated waveguides are performed using optical and scanning electron microscopy. Finally, optical mode profile and loss characterizations confirm the optical functionality of waveguides which prove to be multimodal at 1550 nm