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Low-threshold mid-infrared optical parametric oscillation in periodically poled KTiOPO4
KTH, Superseded Departments, Physics.ORCID iD: 0000-0002-2508-391X
KTH, Superseded Departments, Physics.
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2000 (English)In: Nonlinear Materials, Devices, and Applications, SPIE - International Society for Optical Engineering, 2000, 2-8 p.Conference paper (Refereed)
Abstract [en]

In this work we demonstrate low-threshold oscillation in the mid-infrared spectral region with periodically poled KTiOPO4 (PPKTP) pumped at 1064 nm by a single-frequency Nd:YAG laser. The compact pump laser had a diode-pumped passively Q-switched monolithic ring cavity configuration and could generate up to 70 μJ, 2 ns pulses. With two PPKTP crystals having ferroelectric domain inversion periods of 37.8 μm and 38.5 μm, the temperature tuning bands for the signal (idler) of 1720-1750 nm (2790-2717 nm) and 1850-1920 nm (2510-2390 nm) have been obtained. The lowest oscillation threshold of 8.3 μJ was obtained in a cavity using two mirrors reflecting 99% at the signal and the idler wavelengths. The maximum OPO output power of 6 mW and the pump depletion of 39% was achieved by driving cavity close to stability limit for the idler field. The output power was substantially increased to 36 mW (6 μJ) by using output mirror with 90% reflectivity only in the signal band and optimizing pump focusing conditions. The external OPO efficiency in this case reached 21%.

Place, publisher, year, edition, pages
SPIE - International Society for Optical Engineering, 2000. 2-8 p.
, Proceedings of SPIE - The International Society for Optical Engineering, ISSN 0277-786X ; 3928
Keyword [en]
Laser pulses, Neodymium lasers, Nonlinear optics, Optical parametric oscillators, Phosphates, Potassium compounds, Pumping (laser), Q switched lasers, Ring lasers, Semiconductor lasers
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-162053ScopusID: 2-s2.0-0033897601OAI: diva2:796723
Nonlinear Materials, Devices and Applications, San Jose, CA, USA, , 24 January 2000 through 25 January 2000 (Invited)

QC 20150323

Available from: 2015-03-20 Created: 2015-03-20 Last updated: 2015-03-23Bibliographically approved

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Pasiskevicius, ValdasHellström, Jonas E.Laurell, Fredrik
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