High average power, high energy fiber laser system : operation at 977 nm and frequency doubling at 488 nm

Boullet, Johan; Dubrasquet, R.; Bello-Doua, Ramatou; Traynor, Nicholas; Cormier, Éric

doi:10.1364/assp.2010.awa5

Cited by 2 publications

(2 citation statements)

References 10 publications

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“…Yb-doped phosphate and silica-based fibers have been tailored in recent years to show emission in the 976-980nm spectral region [1][2][3], where frequency doubling can provide output in the blue spectral region [1]. The benefit of operating Yb at short wavelengths means only a single nonlinear converter is required to double to the blue region, offering high efficiency for an overall system.…”

Section: Introductionmentioning

confidence: 99%

486nm blue laser operating at 500 kHz pulse repetition frequency

et al. 2016

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Compact, high power blue light in the 470-490nm region is difficult to generate due to the lack of laser sources which are easily convertible (through parametric processes) to those wavelengths. By using a pulsed Tm-doped fiber laser as a pump source for a 2-stage second harmonic generation (SHG) scheme, we have generated ~2W of 486.5nm light at 500kHz pulse repetition frequency (PRF). To our knowledge, this is the highest PRF and output power achieved in the blue region based on a frequency converted, monolithic fiber laser. This pump laser is a pulsed Tm-doped fiber laser/amplifier which generates 12.8W of 1946nm power at 500kHz PRF with diffraction-limited output from a purely single-mode fiber. The output from this laser is converted to 973nm through second harmonic generation (SHG). The 973nm is then converted to 486.5nm via another SHG stage. This architecture operates with very low peak power, which can be challenging from a nonlinear conversion standpoint. However, the low peak power enables the use of a single-mode monolithic fiber amplifier without undergoing nonlinear effects in the fiber. This also eliminates the need for novel fiber designs, large-mode area fiber, or free-space coupling to rod-type amplifiers, improving reliability and robustness of the laser source. Higher power and conversion efficiency are possible through the addition of Tm-doped fiber amplification stages as well as optimization of the nonlinear conversion process and nonlinear materials. In this paper, we discuss the laser layout, results, and challenges with generating blue light using a low peak power approach.

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Section: Introductionmentioning

confidence: 99%

486nm blue laser operating at 500 kHz pulse repetition frequency

et al. 2016

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“…These visible light sources maintain those fiber laser advantages with a compact frequency conversion stage at the fiber output. Extending the output of frequency doubled Yb fiber lasers down to blue wavelengths requires three level laser operation on the 977 nm line which has a number of challenges [8][9][10] and the output has limited tuning range.…”

Section: Introductionmentioning

confidence: 99%

Pulsed blue laser source based on frequency quadrupling of a thulium fiber laser

Honea

Savage-Leuchs

Bowers

et al. 2013

Fiber Lasers X: Technology, Systems, and Applications

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We describe a pulsed blue (485 nm) laser source based on frequency quadrupling a pulsed Tm fiber laser. Up to 1.2 W at 485 nm was generated with an M 2 of 1.3. At 10 kHz pulse repetition frequency, the output pulse at 485 nm was 65 ns FWHM resulting in an estimated peak power of 1.8 kW. We anticipate further improvements in power scaling with higher power Tm fiber lasers and improved conversion efficiency to the blue with optimized AR coatings and nonlinear optical crystals.

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High average power, high energy fiber laser system : operation at 977 nm and frequency doubling at 488 nm

Abstract: A pulsed fiber laser operating at 977 nm generating >0.75 mJ, 12 ns pulses at adjustable multi- 10kHz of repetition rate is reported. Generation of 16 W of blue light by frequency conversion is also demonstrated.

Cited by 2 publications

References 10 publications

486nm blue laser operating at 500 kHz pulse repetition frequency

486nm blue laser operating at 500 kHz pulse repetition frequency

Pulsed blue laser source based on frequency quadrupling of a thulium fiber laser

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