High-quality, large-area monolayer graphene for efficient bulk laser mode-locking near 1.25 mu m
- Cho, Won Bae; Kim, Jun Wan; Lee, Hwang Woon; Bae, Sukang; Hong, Byung Hee; Choi, Sun Young; Baek, In Hyung; Kim, Kihong; Yeom, Dong-Il; Rotermund, Fabian
- Issue Date
- Optics Letters, Vol.36 No.20, pp.4089-4091
- High-quality monolayer graphene as large as 1.2 x 1.2 cm(2) was synthesized by chemical vapor deposition and used as a transmitting saturable absorber for efficient passive mode-locking of a femtosecond bulk solid-state laser. The monolayer graphene mode-locked Cr:forsterite laser was tunable around 1.25 mu m and delivered sub-100 fs pulses with output powers up to 230mW. The nonlinear optical characteristics of the monolayer graphene saturable absorber and the mode-locked operation were then compared with the case of the bilayer graphene saturable absorber. (C) 2011 Optical Society of America
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