期刊
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
卷 21, 期 1, 页码 -出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSTQE.2014.2341916
关键词
Crystal lasers; erbium; neodymium; planar waveguide; pulsed-laser-deposition; quasi-four-level lasers; thulium; ytterbium
资金
- EPSRC
- Laser Quantum Ltd.
- Engineering and Physical Sciences Research Council [1239349, EP/L021390/1, EP/J008052/1, EP/N018281/1, EP/H005412/1] Funding Source: researchfish
- EPSRC [EP/L021390/1, EP/J008052/1, EP/H005412/1, EP/N018281/1] Funding Source: UKRI
In this paper, we present the underlying advantages that make the crystalline planar waveguide (PW) the key ingredient in power-scaling difficult or weak laser transitions, especially those which are extremely challenging to operate in other gain medium configurations. The planar waveguide architecture is shown to enable efficient laser operation of low-gain and/or quasi-four-level transitions that suffer reabsorption losses. Exemplar configurations are reported to make this case, for example, 1.4 W at 1.8 mu m from a Nd: YAG double-clad planar waveguide laser (PWL), in addition to 0.5 W at 2.7 mu m from a similar highly doped Er: YAG PWL. New laser performance levels from sesquioxide PWs fabricated by pulsed laser deposition are also presented for the first time, with >1 W obtained from a Yb:Y2O3 PWL. Current performance and future prospects are discussed for this laser architecture.
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