Open AccessAll-Fiber Nanosecond Gating for Time-Resolved Spectral Analysis
Author(s) -
Mikael Malmstrom,
Oleksandr Tarasenko,
Walter Margulis,
Fredrik Laurell
Publication year - 2016
Publication title -
ieee photonics technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.81
H-Index - 157
eISSN - 1941-0174
pISSN - 1041-1135
DOI - 10.1109/lpt.2015.2513739
Subject(s) - engineered materials, dielectrics and plasmas , photonics and electrooptics
We demonstrate the addition of time gating to a standard optical spectrum analyzer (OSA) operating in the spectral region ~1.06μm . This is accomplished by opening for 7 ns the optical input to the OSA with an electrically driven poled fiber in a Sagnac loop. The sequential interrogation with nanosecond resolution of the reflection from three fiber Bragg gratings along a piece of fiber allows distinguishing the spectral peaks created with a minimum separation of 85 cm. The passive extinction ratio of this device is >40 dB and returns to >40 dB from >23 dB on a 35-ns time scale directly after time gating.