Intensity Correlation Analysis on Blue-Violet Femtosecond Pulses from a Dispersion-Compensated GaInN Mode-Locked Semiconductor Laser Diode

Applied Sciences

Shunsuke Kono¹  Rintaro Koda²  Hideki Watanabe²  Noriyuki Fuutagawa²  Hironobu Narui² 

[1] Compound Semiconductor Development Department, Semiconductor Device Development Division, Sony Corporation, 4-14-1 Asahi-cho, Atsugi-shi, Kanagawa 243-0014, Japan;

关键词: GaN;    mode-locked semiconductor laser diode;    gain saturation;    saturable absorption;    self-phase modulation;    soliton-like mode locking;   

DOI  :  10.3390/app5030555

来源: mdpi

【 摘 要 】

We investigated the spectral and temporal characteristics of blue-violet femtosecond optical pulses generated by a passively mode-locked GaInN laser diode in a dispersion-compensated external cavity. The output optical pulses at 400 nm were analyzed in detail by intensity auto- and cross-correlation measurements using second harmonic generation on the surface of a β-BaB₂O₄ crystal. The obtained results clarified wavelength-dependent chirp characteristics of the optical pulses. The analysis suggested that a large frequency shift due to saturation in the saturable absorber and gain sections played an important role in the generation of femtosecond optical pulses.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.