| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2010: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2009: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Research Abstract |
Pressure-induced long-period fiber gratings(LPFGs) were formed in fibers by three methods, i. e., mechanical pressure, UV-curable adhesive, and magnetic force. Although the LPFG is known as a band-rejection filter, the bandpass filter response was obtained by cladding-to-core modes conversion. By introducing the LPFG into the rare-earth. doped fiber laser resonator, tunable operation of the fiber lasers was attained. By using the change of the laser output power and the wavelength according to the circumstance of LPFG, simultaneous sensing of temperature and pressure was obtained from the laser output characteristics.
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