Frequency response control of semiconductor laser by using hybrid modulation scheme

Shigeru Mieda, Nobuhide Yokota, Ryuto Isshiki, Wataru Kobayashi, Hiroshi Yasaka

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


A hybrid modulation scheme that simultaneously applies the direct current modulation and intra-cavity loss modulation to a semiconductor laser is proposed. Both numerical calculations using rate equations and experiments using a fabricated laser show that the hybrid modulation scheme can control the frequency response of the laser by changing a modulation ratio and time delay between the two modulations. The modulation ratio and time delay provide the degree of signal mixing of the two modulations and an optimum condition is found when a non-flat frequency response for the intra-cavity loss modulation is compensated by that for the direct current modulation. We experimentally confirm a 8.64-dB improvement of the modulation sensitivity at 20 GHz compared with the pure direct current modulation with a 0.7-dB relaxation oscillation peak.

Original languageEnglish
Pages (from-to)25824-25831
Number of pages8
JournalOptics Express
Issue number22
Publication statusPublished - 2016 Oct 31

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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