激光技术
激光技術
격광기술
LASER TECHNOLOGY
2014年
1期
70-75
,共6页
陈倚竹%张海涛%巩马理%王东生%闫平
陳倚竹%張海濤%鞏馬理%王東生%閆平
진의죽%장해도%공마리%왕동생%염평
光纤光学%超荧光光纤光源%光纤滤波器%双程后向结构%平均波长稳定性
光纖光學%超熒光光纖光源%光纖濾波器%雙程後嚮結構%平均波長穩定性
광섬광학%초형광광섬광원%광섬려파기%쌍정후향결구%평균파장은정성
fiber optics%superfluorescent fiber source%fiber filter%double-pass backward configuration%mean wavelength stability
光纤陀螺要求其光源具有高功率、宽谱输出，同时在大温度范围内仍具有好的平均波长稳定性。为了满足-45℃～70℃大温度范围的应用需求，采用双程后向抽运、法拉第旋转反射、带通滤波等技术手段，对光纤材料和器件进行大温区全局优化，以改善超荧光光纤光源的平均波长稳定性。理论分析了不同中心波长和带宽的带通滤波器以及光纤长度等参量对平均波长稳定性的改善效果，以及和光谱带宽的关系。按照设计结果选择滤波、光纤长度等参量，通过对-45℃～70℃全温区范围进行系统全局优化设计，得到输出功率为32mW，功率稳定性为0．65％，光谱带宽为12．5nm，光源平均波长变化量为23．5×10-6。结果表明，平均波长稳定性在0．5×10-6/℃以下的高稳定性超荧光光纤光源中，32mW 输出功率非常高；所得的0．2×10-6/℃是115℃大温差范围、30mW 以上超荧光光纤光源中非常优异的平均波长稳定性指标，满足光纤陀螺对光纤光源的要求。
光纖陀螺要求其光源具有高功率、寬譜輸齣，同時在大溫度範圍內仍具有好的平均波長穩定性。為瞭滿足-45℃～70℃大溫度範圍的應用需求，採用雙程後嚮抽運、法拉第鏇轉反射、帶通濾波等技術手段，對光纖材料和器件進行大溫區全跼優化，以改善超熒光光纖光源的平均波長穩定性。理論分析瞭不同中心波長和帶寬的帶通濾波器以及光纖長度等參量對平均波長穩定性的改善效果，以及和光譜帶寬的關繫。按照設計結果選擇濾波、光纖長度等參量，通過對-45℃～70℃全溫區範圍進行繫統全跼優化設計，得到輸齣功率為32mW，功率穩定性為0．65％，光譜帶寬為12．5nm，光源平均波長變化量為23．5×10-6。結果錶明，平均波長穩定性在0．5×10-6/℃以下的高穩定性超熒光光纖光源中，32mW 輸齣功率非常高；所得的0．2×10-6/℃是115℃大溫差範圍、30mW 以上超熒光光纖光源中非常優異的平均波長穩定性指標，滿足光纖陀螺對光纖光源的要求。
광섬타라요구기광원구유고공솔、관보수출，동시재대온도범위내잉구유호적평균파장은정성。위료만족-45℃～70℃대온도범위적응용수구，채용쌍정후향추운、법랍제선전반사、대통려파등기술수단，대광섬재료화기건진행대온구전국우화，이개선초형광광섬광원적평균파장은정성。이론분석료불동중심파장화대관적대통려파기이급광섬장도등삼량대평균파장은정성적개선효과，이급화광보대관적관계。안조설계결과선택려파、광섬장도등삼량，통과대-45℃～70℃전온구범위진행계통전국우화설계，득도수출공솔위32mW，공솔은정성위0．65％，광보대관위12．5nm，광원평균파장변화량위23．5×10-6。결과표명，평균파장은정성재0．5×10-6/℃이하적고은정성초형광광섬광원중，32mW 수출공솔비상고；소득적0．2×10-6/℃시115℃대온차범위、30mW 이상초형광광섬광원중비상우이적평균파장은정성지표，만족광섬타라대광섬광원적요구。
Interferometric fiber-optic gyroscopes require the optical sources should have high output power,broad bandwidth,as well as good mean wavelength stability within a large temperature range.To meet the temperature demands from -45℃ to 70℃,a bandpass filter as well as a Faraday rotation mirror was incorporated in the double-pass backward Er-doped superfluorescent fiber source,which,together with the optimization of the performance of fiber and other optical components in such a large temperature range,improved the output mean wavelength of the superfluorescent fiber source a lot.The effects of filters with different central wavelengths and bandwidths,as well as fiber length on mean wavelength stability and output bandwidth were modeled.Based on the simulation result about bandpass filters and fiber length,after optimizing the whole superfluorescent fiber source,the output power reached 32mW;the output bandwidth was 1 2.5nm. From -45℃ to 70℃,the mean wavelength variation of the superfluorescent fiber source was controlled to 23.5 ×1 0 -6 , and the output power variation was 0.65%.According to the investigation,among all superfluorescent fiber sources with mean wavelength stability lower than 0.5 ×1 0 -6 /℃,the 32mW output power is pretty high;the thermal coefficient of 0.2 ×1 0 -6 /℃ is also an excellent result reported for a whole superfluorescent fiber source with output power above 30mW in the 1 1 5℃ temperature range,which satisfies the demands of interferometric fiber-optic gyroscopes.
