Measurement of Gain Saturation Coefficient of a DFB Laser for Lasing Mode Control by Orthogonal Polarization Light

Hiroshi Yasaka, Yuzo Yoshikuni, Masahiko Watanabe

研究成果: Article査読

21 被引用数 (Scopus)

抄録

Frequency response of a 1.55 μm distributed feedback (DFB) laser is measured by injecting light which has the orthogonal polarization to the laser’s lasing mode. The injected light, here we call it as orthogonal polarization light, is carefully selected not to couple to the lasing mode by adjusting its polarization to be orthogonal to that of the lasing mode and by setting its wavelength slightly different from that of the lasing mode. The wavelength of the orthogonal polarization light, however, is set within the range where the laser’s active layer has a gain. The gain saturation coefficients of a distributed feedback (DFB) laser are estimated from the measurement and numerical analysis. The gain saturation coefficients for the lasing light is estimated to be 4.7 × 10-23 cm2 and that by the injected orthogonal polarization light (almost same wavelength as lasing mode) is 3.7 × 10-23 cm2, respectively. The resonant peak intensity and the resonant frequency show almost same behaviors as those in injection current modulation.

本文言語English
ページ(範囲)2248-2255
ページ数8
ジャーナルIEEE Journal of Quantum Electronics
27
10
DOI
出版ステータスPublished - 1991 10月
外部発表はい

ASJC Scopus subject areas

  • 原子分子物理学および光学
  • 凝縮系物理学
  • 電子工学および電気工学

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