'A' cited 'B'.

'A'
Title: Guideline for the design of a fiber optic distributed temperature and strain sensor
Author(s): Gong YD (Gong, Y. D.)
Source: OPTICS COMMUNICATIONS 272 (1): 227-237 APR 1 2007  
Author's address:
Inst Infocomm Res, 21 Heng Mui Keng Terrace, Singapore 119613, Singapore

'B'
Title: A fiber depolarizer using polarization beam splitter loop structure for narrow linewidth light source
Author(s): Yoon I, Lee B, Park S
Source: IEEE PHOTONICS TECHNOLOGY LETTERS 18 (5-8): 776-778 MAR-APR 2006