Studies of 2 µm-band tunable Q-switched fiber lasers using variable microbend

2014 Fiscal Year Final Research Report

• Project/Area Number: 24560044
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Applied optics/Quantum optical engineering
• Research Institution: Shizuoka University
• Principal Investigator: SAKATA Hajime 静岡大学, 工学研究科, 教授 (40377718)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: ファイバレーザ / 動的マイクロベンド / 長周期ファイバグレーティング

Outline of Final Research Achievements

We attained the Q-switched pulse oscillation and wavelength tuning in Tm-doped fiber lasers with all-fiber configuration. In order to obtain the dynamic loss in the gain band using a piezoelectric actuator, we formed variable microbending into the fiber in which the coating layer was flattened. When the 100 mW-class laser diode emitting 1.63μm wavelength was used as the pump source, the output laser pulse showed the emission wavelength of typically 1.9μm and the peak power of order of watts with a pulse width of 1μs. We also demonstrated the wavelength tuning span of 100 nm by means of the tunable fiber grating formed by the coil spring.

Free Research Field

工学