LED-pumped alexandrite laser oscillator and amplifier | Zendy

Pierre Pichon | Zendy; Adrien Barbet | Zendy; Jean-Philippe Blanchot | Zendy; Frédéric Druon | Zendy; François Balembois | Zendy; Patrick Georges | Zendy

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LED-pumped alexandrite laser oscillator and amplifier

Author(s) -

Pierre Pichon,

Adrien Barbet,

Jean-Philippe Blanchot,

Frédéric Druon,

François Balembois,

Patrick Georges

Publication year - 2017

Publication title -

optics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.524

H-Index - 272

eISSN - 1071-2763

pISSN - 0146-9592

DOI - 10.1364/ol.42.004191

Subject(s) - materials science , optics , laser , amplifier , optoelectronics , sapphire , diode , active laser medium , laser power scaling , physics , cmos

Taking advantage of light-emitting-diode (LED) performance breakthrough driven by the lighting market, we report, to the best of our knowledge, the first LED-pumped chromium-doped crystal laser oscillator and amplifier based on alexandrite crystals (Cr 3+ :BeAl 2 O 4 ). We developed a Ce:YAG concentrator as the pumped source, illuminated by blue LEDs that can be easily power scaled. With 2200 LEDs (450 nm), the Ce:YAG concentrator can deliver to the gain medium up to 268 mJ at 10 Hz at 550 nm with a irradiance of 8.5 kW/cm 2 . We demonstrate, in oscillator configuration, an LED-pumped alexandrite laser delivering an energy of 2.9 mJ at 748 nm in free running operation. In the cavity, we measured a double-pass small signal gain of 1.28, which is in good agreement with numerical simulations. As an amplifier, the system demonstrated to boost a CW Ti:sapphire laser by a factor of 4 at 750 nm in eight passes with a large tuning range from 710 nm to 800 nm.

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