Universal all in fiber coherent light source at the wavelength 1550 nm and output power 5 W


  • Paweł Kaczmarek Wroclaw University of Technology
  • Grzegorz Soboń Wroclaw University of Technology
  • Adam Wąż Wroclaw University of Technology
  • Grzegorz Dudzik Wroclaw University of Technology
  • Arkadiusz J. Antończak Wroclaw University of Technology
  • Krzysztof M. Abramski Wroclaw University of Technology




A continuous-wave (CW) and Q-switched operation of a Ho:YLF laser resonantly, single-pass pumped by a Tm: fiber laser operating at a wavelength of 1940nm is presented. At room temperature, for an output coupler of 40% transmission, a maximum CW output power of 11.5W for 32.5W of incident pump power was achieved, corresponding to a slope efficiency of 40%. Applying Q-switching operation, and under CW pumping regime, the pulse repetition frequency (PRF) was changed from 1 to 10kHz. The maximum average output power of 11.23W at the PRF of 10kHz was obtained. Lowering the PRF to 1kHz allows achieving pulse energy of 4.97mJ in a 19ns pulse corresponding to the maximum peak power of 260kW. The Ho:YLF laser operated at the wavelength of 2050.5nm with a FWHM line width of 1.09nm. The output parameters of the laser radiation are sufficient enough to be used for range finding or for pumping mid-infrared optical parametric oscillators. In this paper we present fiber based coherent light source operating at 1550 nm wavelength and 5 W of the output power. It utilizes Master Oscillator Power Amplifier scheme of operation. This allowed to get a universal design which can work in couple different operation regimes: CW, pulsed and wideband ASE generation. All in fiber construction makes it to be compact and environmental conditions resistant.

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How to Cite

P. Kaczmarek, G. Soboń, A. Wąż, G. Dudzik, A. J. Antończak, and K. M. Abramski, “Universal all in fiber coherent light source at the wavelength 1550 nm and output power 5 W”, Photonics Lett. Pol., vol. 6, no. 1, pp. pp. 20–22, Mar. 2014.