Optical parametric oscillator pumped by a coiled multimode fiber amplifier

Angus J. Henderson; Marc Norsen; Jeff P. Koplow

doi:10.1117/12.529657

14 June 2004 Optical parametric oscillator pumped by a coiled multimode fiber amplifier

Angus J. Henderson, Marc Norsen, Jeff P. Koplow

Proceedings Volume 5337, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications III; (2004) https://doi.org/10.1117/12.529657
Event: Lasers and Applications in Science and Engineering, 2004, San Jose, Ca, United States

Abstract

We have demonstrated operation of an optical parametric oscillator (OPO) pumped by a coiled multi-mode fiber amplifier. Coiling of multi-mode fiber amplifiers is a simple technique that allows the output from diode-pumped fibers to be substantially increased relative to that from a standard single-mode fiber, while maintaining the diffraction-limited beam quality. Pulse energies from such fiber amplifiers are high enough to drive nonlinear optical processes. Here we report efficient frequency down-shifting of such a device using an OPO. A diode-pumped Yb-doped fiber was used to amplify 1 microjoule, 20 nanosecond pulses from a 1.064μm Nd:YVO₄ laser to a level of up to 107 microjoules in a single transverse mode, polarized beam. The 6m-length fiber had a 200 micron diameter cladding and a 25 micron core. An unpolarized output of 5.6 Watts was measured for 13 Watts of 976nm diode pump input. Oscillation of a periodically-poled lithium niobate (PPLN) OPO was observed with an oscillation threshold pump pulse energy of 31 microjoules. Up to 0.63 Watts of 1.5μm OPO signal output was measured with 2.6 Watts of incident pump, at a repetition rate of 24kHz. Tuning of the OPO signal wavelength was performed between 1.5 and 1.6μm.

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Angus J. Henderson, Marc Norsen, and Jeff P. Koplow "Optical parametric oscillator pumped by a coiled multimode fiber amplifier", Proc. SPIE 5337, Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications III, (14 June 2004); https://doi.org/10.1117/12.529657

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KEYWORDS

Optical parametric oscillators

Fiber amplifiers

Optical fibers

Optical amplifiers

Crystals

Fiber lasers

Multimode fibers

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