发现高频CO2 激光脉冲写入的新型长周期光纤光栅的谐振波长对特定圆周方向的横向负载不敏感 ,谐振峰幅值随横向负载而线性变化 ;而且这种长周期光纤光栅的谐振波长随温度变化而线性变化 ,谐振峰幅值对温度变化不敏感。由此设计而成的可调增益均衡器可实现谐振波长和幅值的动态独立调节 ,能很好地满足均衡掺铒光纤放大器增益谱的需要 It is found that the resonant wavelength of the new long-period fiber gratings written by high-frequency CO2 laser pulses is insensitive to the transverse load in a specific circumferential direction and the resonant peak amplitude changes linearly with the transverse load. Moreover, the resonant wavelength of this long- Change and linear change, resonant peak amplitude is not sensitive to temperature changes. The designed adjustable gain equalizer can realize the dynamic independent adjustment of the resonant wavelength and amplitude and can well meet the requirement of the gain spectrum of a balanced erbium doped fiber amplifier