Details

Autor(en) / Beteiligte

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

Titel

Frequency response control of semiconductor laser by using hybrid modulation scheme

Ist Teil von

• Optics express, 2016-10, Vol.24 (22), p.25824-25831

Ort / Verlag

United States

Erscheinungsjahr

2016

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• 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.