Effects of Acoustic Reflection on the Performance of a Cladding-Etched All-Fiber Acoustooptic Variable Optical Attenuator

A.A. Au, Q. Li, C.-H. Lin, H.P. Lee
2004 IEEE Photonics Technology Letters  
We analyzed the effects of acoustic reflection on the performance of an acoustooptic variable optical attenuator on a cladding-etched single-mode fiber. It is shown that the acoustic reflection will generate time-dependent modulation on the output optical signal and reduce the maximum achievable attenuation of the device. By employing a tapered fiber structure and using vacuum grease as the acoustic absorber, we showed that the acoustic reflectance can be reduced by two orders and the maximum
more » ... s and the maximum attenuation of the device is increased from 10 to 29 dB. Index Terms-Acoustic reflection, acoustooptic mode coupling, cladding-etched single-mode (SM) fiber, variable optical attenuator (VOA).
doi:10.1109/lpt.2003.819395 fatcat:ce5saccovreudpfujwtxjyj5jq