Characterization of an EDF fiber laser strain-tuned by two high- strength fiber bragg gratings
- Resource Type
- Conference
- Authors
- Haramoni, Nilton; Paterno, Aleksander S.; Silva, Jean C. C.; Kalinowski, Hypolito J.
- Source
- 2007 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference Microwave and Optoelectronics Conference, 2007. IMOC 2007. SBMO/IEEE MTT-S International. :370-374 Oct, 2007
- Subject
- Engineered Materials, Dielectrics and Plasmas
Fields, Waves and Electromagnetics
Aerospace
Communication, Networking and Broadcast Technologies
Photonics and Electrooptics
Fiber lasers
Laser tuning
Erbium-doped fiber lasers
Optical fiber sensors
Gratings
Optical switches
Laser excitation
Tunable circuits and devices
Sensor phenomena and characterization
Optical fiber devices
Laser measurement applications
laser tuning
optical fiber Bragg gratings
optical fiber lasers
optical pumping
relaxation processes
- Language
This paper describes the characterization of a tunable erbium-doped fiber laser with a linear cavity used for fiber Bragg grating sensors interrogation. The laser is mechanically tuned by a highly-stretchable fiber grating that works as a cavity end reflector. A 2 × 1 optical switch allows two gratings to be connected to the laser cavity at a time. The gratings are bonded onto a piezoelectric device that stretches them periodically, inducing Bragg wavelength shifts and tuning the laser output signal. A synchronized TTL signal is applied to the optical switch, changing the end reflector gratings and allowing the system to scan two distinct spectral ranges. The scanning laser signal features significant relaxation oscillations during a short period of time after the grating switching. These oscillations are investigated with reference to the drive current of the laser diode used to pump the EDFL and the pump ratio r.