Influence of the UV-induced fiber loss on the distributed feedback fiber lasers

✍ Scribed by Wei Fan; Bai Chen; Qiquan Qiao; Jialing Chen; Zunqi Lin

• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 135 KB
• Volume: 35
• Category: Article
• ISSN: 0030-3992
• DOI: 10.1016/s0030-3992(03)00025-2

✦ Synopsis

It was found that the output power of the distributed feedback ÿber lasers would be improved after annealing or left unused for several days after the laser had been fabricated, and the output of the fundamental mode would not increase but be clamped while the ±1 order modes would be predominant with the enhancement of the coupling coe cient during the fabrication. The paper discussed the in uence of UV-induced ÿber loss on the ÿber phase-shifted DFB lasers. Due to the gain saturation and ÿber internal loss, which included the temperament loss and permanent loss, there was an optimum coupling coe cient for the DFB ÿber lasers that the higher internal ÿber loss corresponded to the lower optimum values of coupling coe cient.