Amplification of optical delay by use of matched linearly chirped fiber Bragg gratings.
We describe the use of a matched linearly chirped fiber Bragg grating (FBG) pair as a key element in an adjustable optical delay line. This delay line has the unique property that the achievable optical group delay is orders of magnitude greater (factor of 10(2) in our experiment) than the actual physical displacement. We demonstrate operation of such an optical delay line over a delay range of 3.5 mm using a pair of matched 1300-nm chirped FBGs with a bandwidth of 20 nm each.
Yang
Changhuei
C
Department of Biomedical Engineering, 136 Hudson Hall, Duke University, Durham, North Carolina 27708, USA. chyang@caltech.edu
Yazdanfar
Siavash
S
Izatt
Joseph
J
D004867:Equipment Design; D007368:Interferometry / Q000295:instrumentation; D016014:Linear Models; D008962:Models, Theoretical; D055095:Optics and Photonics / Q000295:instrumentation*