基于可調(diào)有源雙耦合器環(huán)級(jí)聯(lián)復(fù)合腔濾波器的2 μ ｍ波段單縱模光纖激光器

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關(guān)鍵詞：有源復(fù)合腔濾波器；銩鈥共摻光纖；單縱模；光纖激光器 中圖分類號(hào)：TN242 文獻(xiàn)標(biāo)識(shí)碼：A DOI：10.37188/CJL.20240287 CSTR：32170.14.CJL.20240287

2- μ m -bandSingle-longitudinal-modeFiberLaserEnabledbyA Tunable Active Dual-coupler Ring Based Compound-cavityFilter

GUO Wenya’， SUN Weiwei'，WU Shengbao"，F(xiàn)ENG Ting ， YAN Fengping4

1.Photonicsfomtionoaionenterollgeofsicsece&eclogyHebeiUnsityoding； 2.SchoolofControl Engineering，Northeastern Universityat Qinhuangdao，Qinhuangdao O66oo4，China;

3.HebeiKeyLaboratoryofMicro-NanoPrecisionOpticalSensingandMeasurementTechnology，QinhuangdaoO66o4，China; 4.SchoolofElectronicandInformationEngineering，BeijingJiaotong University，Beijing1Ooo44，China） *Corresponding Authors，E-mail：swu@hbu.edu.cn; fengting@neuq.edu.cn; fpyan@bjtu.edu.cn

Abstract：A2- μ m -band single-longitudinal-mode（SLM）thulium-holmium co-doped fiberlaser enabledby a tunable active dual-coupler ring based compound-cavity（ADCR-CC） filter is proposed and demonstrated.The ADCRCCfilterwithadjustablefilteringbandwidth（full-widthathalf-maximum，F(xiàn)WHM）and transmitanceiscombined witha fiber Bragg grating（FBG）to realize SLM laseroutput.Whenthe pump powers of the main cavity and the compound-cavity are1.8Wand1.1W，respectively，the wavelength of the measured laseroutputis 2O48.510 nm，the optical signal-to-noiseratio is as highas83.O8dB，and themaximal spectral center wavelength andpeak spectral power fluctuations within90 min are O.O06 nmand0.19dB，respectively，with the laseroutput powerof 50.03 mW.By adjusting the equal strength cantilever beam to change the strainacting on the FBG，the SLM laser can achieve a wavelength-tunable output in the range of1.45 nm.

KeyWords：activecompound-cavityfilter；thuliumholmiumco-doped fiber；single-longitudinal-mode；fiberlaser

1引言

2 μm 波段單縱模（Single-longitudinal-mode，SLM）光纖激光器具有高光束質(zhì)量、長(zhǎng)相干長(zhǎng)度和高頻率分辨率等特性，特別適用于自由空間光通信、高分辨光譜學(xué)、激光雷達(dá)以及高精度光纖傳感[-5]。（剩余14397字）