[1] Pask H M, Archambault J L, Hanna D C, et al. Operation of cladding-pumped Yb3+-doped silica fiber lasers in 1μm region. Electronics Letters, 1994, 30(11): 863-865.
[2] Yahel E, Hardy A. Efficiency optimization of high-power Er3+-Yb3+-codoped fiber amplifiers for wavelength-division-multiplexing applications. Journal of the Optical Society of America B, 2003, 20(6): 1189-1197
[3] Ning D, Huang B C, Xiang Y, et al. Effect of back-cavity mirror on Yb3+-double clad fiber. Acta Optica Sinica, 2003, 23(3): 313-316 (in Chinese)
[4] Hill K O, Fuji Y, Johnson D C, et al. Photosensitivity in optical waveguide: Application to reflection filter fabrication. Applied Physics Letters, 1978, 32(10): 647-649
[5] Hill K O, Malo B, Bilodeau F, et al. Bragg gratings fabricated in monomode photosensitive optical fiber by UV exposure through a phase mask. Applied Physics Letters, 1993, 62(10): 1035-1037
[6] Chuang K P, Lai Y, Sheu L G. Complex fiber grating structures fabricated by sequential writing with polarization control. Optics Letters, 2004, 29(4): 340-342
[7] Bilodeau F, Johnson D C, Malo B, et al. Ultraviolet-light photosensitivity in Er3+-Ge-doped optical fiber. Optics Letters, 1990, 15(20): 1138-1140
[8] Brambilla G, Pruneri V, Peekie L. Photorefractive index gratings in SnO2:SiO2 optical fibers. Applied Physics Letters, 2000, 76(7): 807-809
[9] Pal S, Sun T, Grattan K T V, et al. Bragg gratings written in Sn-Er-Ge-codoped silica fiber: investigation of photosensitivity, thermal stability, and sensing potential. Journal of the Optical Society of America A, 2004, 21(8): 1503-1511
[10] Oh S T, HanWT, Paek U C, et al. Discrimination of temper-ature and strain with a single FBG based on the birefringence effect. Optics Express, 2004, 12(4): 724-729
[11] Archambault J L, Grubb S G. Fiber gratings in lasers and amplifiers. Journal of Lightwave Technology, 1997, 15: 1378-1390
[12] Li L J, Fan W D, Wang Z, et al. Experimental studies on narrow-linewidth Yb3+-doped double-clad fiber-laser cavities based on double-clad fiber Bragg gratings. Microwave and Optical Technology Letters, 2005, 44(1): 53-56
[13] Li L J, Feng X H, Liu Y G, et al. Experimental investigation of high power Erbium-Ytterbium co-doped double clad fiber laser. Chinese Physics Letters, 2004, 21(12): 2426-2428
[14] Li L J, Liu Y G, Jia X J, et al. Resonant nonlinearity in Ytterbium-doped double-clad fiber Bragg grating. Microwave and Optical Technology Letters, 2006, 48(3): 430-432
[15] Li L J, Wang Z, Fan W D, et al. Yb3+-doped double-clad fiber laser with all fiber cavity. Chinese Optics Letters, 2004, 2(10): 592-594
[16] Li L J, Fan W D, Fu S G, et al. Yb3+-doped double-clad fiber laser with frequency selecting by double-clad fiber Bragg grating. Acta Optica Sinica, 2005, 25(1): 55-58 (in Chinese)
[17] Li L J, Wang Z, Fan W D, et al. Wavelength chirp-free tunalbe Yb3+-doped double cladding fiber laser. Acta Photonica Sinica, 2005, 34(2): 184-186 (in Chinese)
[18] Li L J, Sun L, Fan W D, et al. A strain-induced birefringent double-clad fiber Bragg grating. Chinese Optics Letters, 2005, 3(7): 383-385
