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Opt Lett. 2005 Sep 1;30(17):2281-3.

Narrowband bulk Bragg grating optical parametric oscillator.

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  • 1Department of Physics, Royal Institute of Technology, Albanova, 106 91 Stockholm, Sweden. bj@laserphysics.kth.se

Abstract

A narrowband, pulsed optical parametric oscillator (OPO) whose output coupler is a bulk glass Bragg grating is demonstrated. The OPO is based on periodically poled KTiOPO4 and is pumped by a pulsed, frequency-doubled Nd:YAG laser at 532 nm, generating a signal at 975 nm with a total efficiency of 35%. This novel and compact device shows a spectral bandwidth of 0.16 nm (50 GHz), a decrease by a factor of 20 compared with that when a conventional mirror is used. By using a folded cavity, we demonstrate tunable radiation with a tuning range of 60 nm and maintained spectral bandwidth.

PMID:
16190444
[PubMed]
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