6533b83afe1ef96bd12a7957
RESEARCH PRODUCT
Q-switched all-fiber laser based on magnetostriction modulation of a Bragg grating
Ricardo DuchowiczMiguel V. AndrésPere Pérez-millánAntonio DiezDobryna Zalvideasubject
PHOSFOSDistributed feedback laserOptical fiberMaterials sciencebusiness.industryPhysics::OpticsLong-period fiber gratingGratingÒpticaLaserAtomic and Molecular Physics and Opticslaw.inventionCondensed Matter::Materials ScienceOpticsFiber Bragg gratinglawFiber laserbusinessdescription
We report an actively Q-switched all-fiber laser based on magnetostriction modulation of a Bragg grating. The laser employs a pair of Bragg gratings as reflective mirrors, one of which is bonded to a magnetostrictive element. Lengthening of the magnetostrictive element when a magnetic field is applied shifts the Bragg wavelength of the grating, allowing control of the Q-factor of the cavity and, thus, performing active Q-switching. The magnetostrictive modulator is small, compact and requires less than 300 mW electrical drive power. Using erbium-doped fiber and a maximum pump power of 120 mW, Q-switch pulses of more than 1 W peak power were obtained, with a pulse repetition rate that can be continuously varied from 1 Hz to 125 kHz.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-06-06 |