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Article

Research Paper

Journal of the Optical Society of Korea 2013; 17(2): 117-129

Published online April 25, 2013 https://doi.org/10.3807/JOSK.2013.17.2.117

Copyright © Optical Society of Korea.

Wavelength-Tunable, Passively Mode-Locked Erbium-Doped Fiber Master-Oscillator Incorporating a Semiconductor Saturable Absorber Mirror

Luis A. Vazquez-Zuniga and Yoonchan Jeong

Laser Engineering and Applications Laboratory, Department of Electrical and Computer Engineering, Seoul National University

Received: February 7, 2013; Revised: March 16, 2013; Accepted: March 18, 2013

Abstract

We briefly review the recent progress in passively mode-locked fiber lasers (PMLFLs) based on semiconductor saturable absorber mirrors (SESAMs) and discuss the detailed characterization of a SESAM-based, passively mode-locked erbium-doped fiber (EDF) laser operating in the 1.5-${\mu}m$ spectral range for various configurations. A simple and compact design of the laser cavity enables the PMLFL to generate either femtosecond or wavelength-tunable picosecond pulses with high stability as the intra-cavity filtering method is altered. All the cavities investigated in our experiments present self-starting, continuous-wave mode-locking with no Q-switching instabilities. The excellent stability of the source eventually enables the wavelength-tunable PMLFL to be used as a master oscillator for a power-amplifier source based on a large-core EDF, generating picosecond pulses of >10-kW peak power and >100-nJ pulse energy.

Keywords: Mode-locked lasers, Erbium fiber lasers, Semiconductor saturable absorber mirrors, Picosecond pulses,

OCIS codes: 140.3510; 140.3500; 140.4050; 320.5550