Intensity Correlation Analysis on Blue-Violet FemtosecondPulses from a Dispersion-Compensated GaInN Mode-LockedSemiconductor Laser Diode

We investigated the spectral and temporal characteristics of blue-violetfemtosecond optical pulses generated by a passively mode-locked GaInN laser diode ina dispersion-compensated external cavity. The output optical pulses at 400 nm wereanalyzed in detail by intensity auto- and cross-correlation me...

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Bibliographic Details
Published inApplied sciences Vol. 5; no. 3; pp. 555 - 565
Main Authors Kono, Shunsuke, Koda, Rintaro, Watanabe, Hideki, Fuutagawa, Noriyuki, Narui, Hironobu
Format Journal Article
LanguageEnglish
Published MDPI AG 10.09.2015
Subjects
gain saturation
GaN
mode-locked semiconductor laser diode
saturableabsorption
self-phase modulation
soliton-like mode locking
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Summary:We investigated the spectral and temporal characteristics of blue-violetfemtosecond optical pulses generated by a passively mode-locked GaInN laser diode ina dispersion-compensated external cavity. The output optical pulses at 400 nm wereanalyzed in detail by intensity auto- and cross-correlation measurements using secondharmonic generation on the surface of a β-BaB2O4 crystal. The obtained results clarifiedwavelength-dependent chirp characteristics of the optical pulses. The analysis suggestedthat a large frequency shift due to saturation in the saturable absorber and gain sectionsplayed an important role in the generation of femtosecond optical pulses.
ISSN:2076-3417
2076-3417
DOI:10.3390/app5030555