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Proceedings Paper

Mid-infrared ZGP optical parametric oscillator directly pumped by a lamp-pumped, Q-switched Cr,Tm,Ho:YAG laser.
Author(s): Ab F. Nieuwenhuis; Chris J. Lee; Peter J. M. van der Slot; Petra Groß; K.-J. Boller
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Paper 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.

Paper Details

Date Published: 14 February 2007
PDF: 9 pages
Proc. SPIE 6455, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VI, 645518 (14 February 2007); doi: 10.1117/12.700618
Show Author Affiliations
Ab F. Nieuwenhuis, Univ. of Twente (Netherlands)
Chris J. Lee, Univ. of Twente (Netherlands)
Peter J. M. van der Slot, Univ. of Twente (Netherlands)
Petra Groß, Univ. of Twente (Netherlands)
K.-J. Boller, Univ. of Twente (Netherlands)


Published in SPIE Proceedings Vol. 6455:
Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications VI
Peter E. Powers, Editor(s)

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