Bandwidth-limited picosecond pulse generation by hybrid mode-locking in a ring cavity GaAlAs laser

Author

McInerney, J. ; Reekie, L. ; Bradley, D.J.

Author_Institution

Trinity College, Laser Group Department of Pure & Applied Physics, Dublin, Ireland

Volume

21

Issue

3

fYear

1985

Firstpage

117

Lastpage

118

Abstract

Bandwidth-limited picosecond pulses have been obtained using hybrid active/passive mode-locking in an external cavity semiconductor diode ring laser. Active mode-locking by application of sinusoidal RF modulation at the cavity round-trip frequency to a diode laser providing gain is supplemented by passive mode-locking in a second laser which is biased to provide saturable loss. Simultaneous streak camera and scanning Fabry-Perot interferometer measurements show that bandwidth-limited pulses of 25 Ps duration are obtained. Operation is not limited to near laser threshold, and frequency detuning sensitivity is improved when compared to the case of purely active mode-locking.

Keywords

III-V semiconductors; aluminium compounds; gallium arsenide; laser mode locking; light interferometry; ring lasers; semiconductor junction lasers; streak photography; active mode locking; bandwidth limited picosecond pulse generation; cavity round-trip frequency; frequency detuning sensitivity; hybrid mode-locking; passive mode-locking; ring cavity GaAlAs laser; saturable loss; scanning Fabry-Perot interferometer measurements; semiconductor diode ring laser; sinusoidal RF modulation; streak camera;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el:19850081

Filename

4257151