一种风速仪用485nm、532nm双波长光纤输出激光器，设置485nm四波混频的周期极化铌酸锂激光谐振腔，在532nm激光输出光纤尾段设置532nm分束光纤圈，分束一路532nm输出，信号光485nm、闲频光1319nm、泵浦光I 1064nm与泵浦光II 532nm进入485nm四波混频周期极化铌酸锂激光谐振腔，发生四波混频效应，产生信号光485nm输出，最后输出485nm、532nm双波长光纤激光输出。
A 485nm and 532nm dual-wavelength optical fiber output laser used for an anemograph is disclosed. A 485nm four-wave mixing period polarization lithium niobate laser resonator is arranged. A tail segment of a 532nm laser output optical fiber is provided with a 532nm beam-splitting optical fiber loop so as to split one beam of 532nm laser output. Signal light 485nm, idle light 1319nm, pump light I 1064nm and pump light II 532nm are entered into the 485nm four-wave mixing period polarization lithium niobate laser resonator so as to generate a four-wave mixing effect and generate a signal light 485nm output, and finally 485nm and 532nm dual-wavelength optical fiber laser outputs are output.