Generation and amplification of 350 fs, 2 µm pulses in Tm:fiber

R. Andrew Sims; Pankaj Kadwani; Lawrence Shah; Martin Richardson

doi:10.1117/12.877765

21 February 2011 Generation and amplification of 350 fs, 2 μm pulses in Tm:fiber

R. Andrew Sims, Pankaj Kadwani, Lawrence Shah, Martin Richardson

Proceedings Volume 7914, Fiber Lasers VIII: Technology, Systems, and Applications; 79141L (2011) https://doi.org/10.1117/12.877765
Event: SPIE LASE, 2011, San Francisco, California, United States

Abstract

Amplified ultrashort pulses at 2 μm are of great interest for atmospheric sensing, medical, and materials processing applications. We describe the generation and amplification of femtosecond 2 μm pulses in thulium doped silica fiber. Mode-locked eye-safe laser pulses at ~2 μm were generated in a Tm:fiber oscillator using a single-walled carbon nanotube saturable absorber. Stable mode-locking was achieved at a repetition rate of 70 MHz with soliton pulses reaching energies of ~40 pJ with a spectral bandwidth of ~8 nm. Autocorrelation measurements indicated bandwidth limited pulses of ~500 fs duration. This oscillator was used to seed a Tm:fiber amplifier in both free space and fiber coupled configurations. Effects of dispersion compensation and pulse amplification are reported.

Citation Download Citation

R. Andrew Sims, Pankaj Kadwani, Lawrence Shah, and Martin Richardson "Generation and amplification of 350 fs, 2 μm pulses in Tm:fiber", Proc. SPIE 7914, Fiber Lasers VIII: Technology, Systems, and Applications, 79141L (21 February 2011); https://doi.org/10.1117/12.877765

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