High energy fiber pulse sources by photonic bandgap fibers and multicore fibers

2015 Fiscal Year Final Research Report

• Project/Area Number: 25247067
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Atomic/Molecular/Quantum electronics
• Research Institution: The University of Electro-Communications
• Principal Investigator: Shirakawa Akira 電気通信大学, 学内共同利用施設等, 准教授 (00313429)
• Co-Investigator(Kenkyū-buntansha): Saito Kazuya 豊田工業大学, 工学部, 教授 (20278394) ; Saitoh Kunimasa 北海道大学, 情報科学研究科, 教授 (20333627)
• Project Period (FY): 2013-05-31 – 2016-03-31
• Keywords: ファイバーレーザー / パルスレーザー / フォトニックバンドギャップファイバーレーザー / マルチコアファイバー / 位相同期レーザーアレイ

Outline of Final Research Achievements

We have explored new methods for scaling the energy/peak-power limits of fiber lasers determined by various fiber nonlinearities. Photonic bandgap fiber has the inherent distributed spectral filtering, enabling suppression of stimulated Raman scattering. We have achieved an order of magnitude power scaling of pulsed fiber lasers. In addition, mitigation of stimulated Brillouin scattering by acoustic antiguiding was also pursued and we demonstrated high-power single-frequency operation.
We also studied power scaling by multicore fibers. Phase-locking operations by self-imaging as well as by a new method of using a saturable absorber have been demonstrated. We showed the self-focusing limit, the ultimate limit among various nonlinearities, can be scaled by the core number by adopting the out-of-phase mode.

Free Research Field

量子エレクトロニクス