Mid-infrared ZGP optical parametric oscillator directly pumped by a lamp-pumped, Q-switched Cr,Tm,Ho:YAG laser.

Ab F. Nieuwenhuis; Chris J. Lee; Peter J. M. van der Slot; Petra Groß; K.-J. Boller

doi:10.1117/12.700618

14 February 2007 Mid-infrared ZGP optical parametric oscillator directly pumped by a lamp-pumped, Q-switched Cr,Tm,Ho:YAG laser.

Ab F. Nieuwenhuis, Chris J. Lee, Peter J. M. van der Slot, Petra Groß, K.-J. Boller

Author Affiliations +

Proceedings Volume 6455, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VI; 645518 (2007) https://doi.org/10.1117/12.700618
Event: Lasers and Applications in Science and Engineering, 2007, San Jose, California, United States

Abstract

We generate mid-infrared pulsed light tunable between 5.6 &mgr;m and 6.6 &mgr;m using an optical parametric oscillator (OPO) directly pumped by a Cr,Tm,Ho:YAG, Q-switched laser operating at 2.1 &mgr;m. The Holmium laser uses a RTP Q-switch to produce pulses shorter than 100 ns and energies of up to 42 mJ in a single spatial transverse mode at a repetition rate of 5 Hz. To our knowledge this is the first report on a lamp pumped Cr,Tm,Ho:YAG laser using a RTP crystal as an electro-optical Q-switch. The OPO is based on a ZnGeP₂ (ZGP) crystal cut for type I phase matching. The singly resonant OPO (SRO) uses a linear cavity consisting of two plane mirrors to minimize the required pump flux to reach threshold. The SRO has a threshold of 2.4 mJ, a maximum idler pulse energy of 3.1 mJ, and is tunable from 5.6 to 6.6 &mgr;m. Operation in this wavelength range, combined with wide tuning and a high pulse energy makes this SRO particularly suitable for tests in the field medical application, e.g., for cutting of soft tissue during surgery or corneal corrections.

Citation Download Citation

Ab F. Nieuwenhuis, Chris J. Lee, Peter J. M. van der Slot, Petra Groß, and K.-J. Boller "Mid-infrared ZGP optical parametric oscillator directly pumped by a lamp-pumped, Q-switched Cr,Tm,Ho:YAG laser.", Proc. SPIE 6455, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VI, 645518 (14 February 2007); https://doi.org/10.1117/12.700618

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