title: Pulsed, single-frequency, ring laser with a holographic output coupler.
abstract: A unidirectional, passively Q-switched, 2.05-μm Ho:YLF ring laser providing single-frequency, sub-mJ-energy, 100-200-ns-long laser pulses at a kHz rate is reported. The wavelength selection and "coarse" spectral narrowing is performed by utilizing a volume Bragg grating as a resonant, narrowband output coupler operated at a small angle away from normal incidence. Pulsed operation of the Ho:YLF oscillator and further spectral narrowing down to a single longitudinal mode is achieved via passive Q-switching using a Cr2+-doped saturable absorber.
authors: Q-Peak, Inc., Bedford, Massachusetts 01730, USA. dergachev@qpeak.com
authors: Alex
authors: A
authors: Dergachev
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D006696:Holography / Q000295:instrumentation*; D007834:Lasers; D014159:Transducers