'A'
D. Chen, Z. Yu, S. Qin, and S. He,
"Some switchable dual-wavelength fibre lasers based on fiber Bragg grating feedback,"
Proc. SPIIE, vol 6351, paper 63512I, 2006.
Authors' address:
Dept. of Optical Engineering, Zhejiang Univ., Hangzhou, China

'B'
Y. W. Lee and B. Lee, "Wavelength-switchable erbium-doped fiber ring laser using spectral polarization-dependent loss element," IEEE Photonics Technology Letters, vol. 15, no. 6, pp. 795-797, 2003.