[OPTICAL REVIEW Vol. 17, No. 2 (2010) 50-53]
© 2010 The Japan Society of Applied Physics

Linearly Polarized 100-kW-Peak-Power Pulsed Fiber Laser with a Novel Master Oscillator

Masafumi BABA, Takehiko FUJISHIRO, Shigeru YAMAGUCHI, Kazuyoku TEI, Makoto YOSHIDA1, Tsutomu SAKURAI1, and Ken-ichi TANAKA1

Department of Physics, Tokai University, 1117 Kitakaname, Hiratsuka, Kanagawa 259-1292, Japan
1Seikoh Giken Co., Ltd., 296-1 Matsuhidai, Matsudo, Chiba 270-2214, Japan

(Received December 2, 2009; Accepted February 3, 2010)

We report progress in the design and fabrication of a monolithic, linearly polarized, pulsed, Yb-doped fiber laser. This laser has a peak power of more than 100 kW, a tunable repetition rate from 100 kHz to 1 MHz, a tunable pulse duration from 2 ns to 2.5 μs, and a diffraction-limited, linearly polarized output beam with a mean power of 21 W and a wavelength of 1064 nm. A seed source that consists of a microchip Nd:YVO4 laser and an electro optic deflector is developed. Using this source, the repetition rate and pulse duration are varied independently of each other. In addition, an excellent pulse-to-pulse repeatability is achieved.

Key words: electro optic deflector, seed source, fiber amplifier, high peak power, linearly polarized laser