Fibre-optic 100 fs pulse amplification and transmission system in the telecom range
We have fabricated and investigated an efficient all-fibre source of ultrashort pulses of 100 fs duration with an energy of up to 5 nJ in the telecom range (near λ = 1.56 μm). Pulses from an erbium-doped fibre master oscillator with a minimum duration of 127 fs and repetition rate of 38.1 MHz were amplified in an erbium-doped active fibre to a maximum average power of 194.3 mW with a 30 % efficiency under pumping by 640-mW single-mode laser diodes at a wavelength λ{sub pump} = 976 nm and then compressed to an ∼100 fs duration in a silica fibre with reduced nonlinearity (LMA fibre). The compressed pulses were launched with an efficiency over 80 % into a hollow-core microstructured revolver fibre (HCRF) with a cladding formed by noncontacting cylindrical silica glass capillary tubes and a 61-μm-diameter hollow core. The measured loss for the fundamental mode of this fibre was under 30 dB km{sup −1} at λ = 1.56 μm. Owing to the weak nonlinearity and low dispersion of the HCRF, output pulses were similar in characteristics (duration and spectrum) to input pulses even at HCRF lengths above 10 m. (lasers)
- OSTI ID:
- 23000302
- Journal Information:
- Quantum Electronics (Woodbury, N.Y.), Journal Name: Quantum Electronics (Woodbury, N.Y.) Journal Issue: 7 Vol. 48; ISSN 1063-7818; ISSN QUELEZ
- Country of Publication:
- United States
- Language:
- English
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