In-phase synchronization of array laser using intra-Talbot-cavity second harmonic generation

Kenichi Hirosawa, Fumio Shohda, Takayuki Yanagisawa, Fumihiko Kannari

研究成果: Conference contribution

2 被引用数 (Scopus)


Talbot cavity is passive method to synchronize the phase of array lasers. Because the Talbot cavity does not need any electrical feedback systems, we believe that Talbot cavity is the most suitable technique to combine a considerable number of laser array into a compact system. A well-known drawback of the Talbot cavity is that it can produce out-phased array and their far-field image has 2-peak profile. To solve this drawback, we developed a frequency doubled laser array based on intra-Talbot-cavity second harmonic generation. Basic concept is second harmonic generation of the out-phased array generated from the Talbot cavity. Because the second harmonic wave is generated proportionally to the square of the fundamental wave, out-phase flips to in-phase. Our Talbot cavity is composed of a pumping 808-nm laser diode array with 15 emitters, an Nd:YVO4 planar waveguide, a PPLN planar waveguide, an f =10 cylindrical lens, and an output coupler (high reflection for 1064 nm and high transition to 532 nm). The pump laser beams are directly launched into the Nd:YVO4. The fundamental wave (1064 nm) oscillates between the Nd:YVO4 and the output coupler and generates second harmonic wave (532 nm) at the PPLN placed next to the Nd:YVO4. The round-trip optical path of the cavity length is set to 1/2 Talbot length so that Talbot cavity forms for the fundamental wave. As a result, we obtained 1-peak far-field image of second harmonic wave from the intra-Talbot-cavity second harmonic generation.

ホスト出版物のタイトルSolid State Lasers XXIV
ホスト出版物のサブタイトルTechnology and Devices
編集者W. Andrew Clarkson, Ramesh K. Shori
出版ステータスPublished - 2015 1月 1
イベントSolid State Lasers XXIV: Technology and Devices - San Francisco, United States
継続期間: 2015 2月 82015 2月 10


名前Proceedings of SPIE - The International Society for Optical Engineering


OtherSolid State Lasers XXIV: Technology and Devices
国/地域United States
CitySan Francisco

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学


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