Abstract

A 1.3 GHz repetition rate optically pumped passively mode-locked semiconductor disk laser with 5.5 ps pulse duration and 204 mW average output power at 978 nm wavelength was demonstrated. Main factors preventing the mode-locked laser from higher output power, such as the epitaxy structure of wafer and thermal characteristics of gain chip were investigated, and corresponding methods to improve the thermal performance of the laser, e.g., growing the wafer in a reversed sequence, removing substrate entirely and using a diamond as heat spreader, were proposed. The experimental results showed that both the microcavity mode of laser and the emission wavelength of QWs redshifted when the pump power increased, but their redshift rates were different. This suggested us to consider a pre-offset between the emission wavelength of QWs at room temperature and the target wavelength of laser at an intense pump, and the pre-offset values of the wavelength should be designed deliberately to guarantee the resonant periodic gain structure working properly when the temperature in the active region approaches the desired value.

Mode-locked semiconductor disk lasers

Mahmoud A. Gaafar, Arash Rahimi-Iman, Ksenia A. Fedorova, Wolfgang Stolz, Edik U. Rafailov, and Martin Koch
Adv. Opt. Photon. 8(3) 370-400 (2016)

Passively mode-locked GaInNAs disk laser operating at 1220 nm

Jussi Rautiainen, Ville-Markus Korpijärvi, Janne Puustinen, Mircea Guina, and Oleg G. Okhotnikov
Opt. Express 16(20) 15964-15969 (2008)

Picosecond passively mode-locked GaSb-based semiconductor disk laser operating at 2μm

Antti Härkönen, Jonna Paajaste, Soile Suomalainen, Jukka-Pekka Alanko, Christian Grebing, Riku Koskinen, Günter Steinmeyer, and Mircea Guina
Opt. Lett. 35(24) 4090-4092 (2010)

Power-scalable 1.57 μm mode-locked semiconductor disk laser using wafer fusion

Esa J. Saarinen, Janne Puustinen, Alexei Sirbu, Alexandru Mereuta, Andrei Caliman, Eli Kapon, and Oleg G. Okhotnikov
Opt. Lett. 34(20) 3139-3141 (2009)

Dynamics of pulse formation in mode-locked semiconductor disk lasers

Esa J. Saarinen, Robert Herda, and Oleg G. Okhotnikov
J. Opt. Soc. Am. B 24(11) 2784-2790 (2007)