@inproceedings{d958ade55b4b4072bb3fca54c5f5e06f,
title = "Single-frequency pulsed fiber lasers at ∼1.5 μm and fiber-based narrow linewidth THz sources",
abstract = "We have implemented monolithic narrow linewidth single-mode single-frequency pulsed fiber lasers in master oscillator and power amplifier (MOPA) configuration based on highly Er/Yb co-doped phosphate fiber with core size of 25 μm. The narrow linewidth pulsed fiber laser seed has been achieved by directly modulating single-frequency CW fiber laser. An arbitrary waveform generator (AWG) was used to pre-shape the pulse shapes in order to avoid the pulse distortion and the dynamic gain saturation in the cascade fiber amplifiers. Based on the newly developed large core single-mode highly Er/Yb co-doped phosphate fiber in the power amplifier stage, the peak power of single-mode pulses can be scaled to more than 100 kW with transform-limited linewidth and diffraction-limited beam quality. These high power narrow linewidth single-mode fiber laser pulses have been successfully used to generate coherent THz waves based on difference-frequency generation (DFG) in GaSe crystal. The single-pass generated THz peak power can reach 0.12 W. Moreover, we have observed the external cavity enhancement of DFG THz generation by using ZnGeP2 for the first time, and implemented a high spectral resolution THz spectrometer based on the developed fiber-based tunable narrow linewidth THz source.",
keywords = "Fiber amplifier, Fiber laser, Fiber optics amplifiers and oscillators, Pulses, Terahertz",
author = "Wei Shi and Petersen, {Eliot B.} and Nguyen, {Dan T.} and Jie Zong and Zhidong Yao and Arturo Chavez-Pirson and Nasser Peyghambarian",
year = "2010",
doi = "10.1117/12.835982",
language = "English (US)",
isbn = "9780819479785",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Nonlinear Frequency Generation and Conversion",
note = "Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications IX ; Conference date: 25-01-2010 Through 28-01-2010",
}