Chirped pulse amplification in single mode Tm:fiber using a chirped Bragg grating
We report femtosecond pulse generation and chirped pulse amplification in Tm:fiber. A mode-locked oscillator operating in the soliton regime produced 800 fs pulses with 5 nm spectral bandwidth, at 40 pJ pulse energy. This oscillator seeded a pre-amplifier that utilizes a Raman soliton self-frequency shift to produce wavelength tunable pulses with 3 nJ energy, reduced pulse duration of 150 fs, and increased bandwidth of 30 nm. For further amplification, the pulses were stretched up to 160 ps using a chirped Bragg grating (CBG). Stretched pulses were amplified to 85 nJ after compression in single-mode Tm:fiber and recompressed with the CBG as short as 400 fs. Compressed pulses were coupled into a highly nonlinear tellurite fiber to investigate the potential of this ultrashort pulse 2-μm fiber source as a pump for mid-IR supercontinuum generation.
KeywordsSoliton TeO2 Chirp Pulse Amplification Dispersion Compensate Fiber Hyperbolic Secant Pulse
The authors acknowledge the support of the Department of Defense (DoD) High Energy Laser Joint Technology Office (JTO) through the Multidisciplinary Research Initiative (MRI) program (contract #W911NF-05-1-0517), the Office of Naval Research (ONR) through a Defense University Research Program (contract #N000141210144), and the State of Florida.
- 2.D. Buccoliero, H. Steffensen, O. Bang, H. Ebendorff-Heidepriem, T.M. Monro, Appl. Phys. Lett. 97, 061106 (2010)Google Scholar