A compact and low-cost device for monitoring the peak wavelength of single-peak spectral distributions is presented. The system is based on the transmission properties of a fiber Bragg grating when its period is modulated. Different types of optical signal, such as the emission of distributed-feedback lasers and the reflection of a broadband optical source produced by fiber gratings used in sensor systems, can be measured with this device. We demonstrate that a high wavelength resolution of ~1 pm can be achieved and that our proposal can be used for real-time monitoring.
© 2004 Optical Society of America
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
José Mora, José Luis Cruz, Miguel V. Andrés, and Ricardo Duchowicz, "Simple High-Resolution Wavelength Monitor Based on a Fiber Bragg Grating," Appl. Opt. 43, 744-749 (2004)