1064nm波长双向泵浦的S波段掺铥石英光纤放大器(英文)

A Bi-directionally Pumped S-band Thulium-doped Silica Fiber Amplifier Using Up-conversion Pumping at 1064 nm

研究了1064nm波长双向泵浦的掺铥石英光纤放大器(TDSFA),测量了信号开关增益随泵浦功率和信号波长的变化情况.在最大入纤功率1400mW泵浦下,放大器在1 485～1 517 nm的较宽范围内具有放大能力,最大增益3.76dB.分析表明,弱的基态吸收和强的激发态吸收限制了放大器增益的进一步提高,表明上转换泵浦的TDSFA是可行的.

The TDFA （Thulium-Doped Fiber Amplifier） is a promising candidate for an amplifying device in S band. We established a biirectionally pumped Thulium-Doped Silica Fiber Amplifier （TDSFA） with a single 1 064 nm pump wavelength in order to know the characteristics of the amplifier. The on-off gain was measured for simplicity. The gain varying with pump power and with signal wavelength was studied in detail. At the maximum launched pump power of 1 400 mW, the amplifier had a gain over a wide wavelength region of 1 485 to 1 517 nm, with a peak gain of 3.76 dB. Weak GSA （Ground-State Absorption） and strong ESA （Excited-State Absorption） limit the further increase of the gain. The results show that TDSFA is operable using such an upconversion pumping scheme.