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Optical Engineering

Broadly tunable intracavity zinc germanium phosphate optical parametric oscillator for hyperspectral imaging
Author(s): Gordon Robertson; Gareth T. Maker; Graeme P. Malcolm
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Paper Abstract

We report, to our knowledge, the first operation of a singly-resonant intracavity optical parametric oscillator (OPO) using the nonlinear material zinc germanium phosphate. The broadly tunable OPO uses a 7-W cw thulium fiber laser pump source to produce <100  mW of tunable mid-infrared light at repetition rates up to 30 kHz. The measured tuning range is 5.5 to 10 μm. The compact, low threshold source was used to perform spectroscopy of various substances. In addition, hyperspectral images were taken by combining the system with a scanning mirror pair and infrared photodiode.

Paper Details

Date Published: 23 June 2014
PDF: 5 pages
Opt. Eng. 53(6) 063106 doi: 10.1117/1.OE.53.6.063106
Published in: Optical Engineering Volume 53, Issue 6
Show Author Affiliations
Gordon Robertson, M Squared Lasers (United Kingdom)
Gareth T. Maker, M Squared Lasers (United Kingdom)
Graeme P. Malcolm, M Squared Lasers (United Kingdom)

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