Internal Q-switching in semiconductor lasers: high intensity pulses of the picosecond range and the spectral peculiarities

Sergei Vainshtein, Victor Rossin, Ari Kilpelä, Juha Kostamovaara, Risto Myllylä, Kari Määttä

Research output: Contribution to journalArticleScientificpeer-review

16 Citations (Scopus)

Abstract

Optical pulses of /spl sim/100 ps duration, and /spl sim/10/sup 2/ W power were obtained from the industrial single heterostructure lasers with a standard pulse generation power of /spl sim/10 W in the internal Q-switching mode. Temporal and spectral analyses allow three components to be distinguished in the laser optical pulses: ordinary delayed pulses of large duration at energies considerably lower than the energy gap, short optical pulses caused by the gain-switching effect at higher energies, and short optical pulses at the end of the current pulse (Q-switching mode) at the highest energies. A model is proposed involving band tail states as a saturable absorber causing large delays.
Original languageEnglish
Pages (from-to)1015-1021
JournalIEEE Journal of Quantum Electronics
Volume31
Issue number6
DOIs
Publication statusPublished - 1995
MoE publication typeA1 Journal article-refereed

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