红外与激光工程
紅外與激光工程
홍외여격광공정
INFRARED AND LASER ENGINEERING
2014年
10期
3262-3268
,共7页
林桢%任国斌%郑斯文%朱博枫%彭万敬%简水生
林楨%任國斌%鄭斯文%硃博楓%彭萬敬%簡水生
림정%임국빈%정사문%주박풍%팽만경%간수생
光纤激光器%可切换多波长%相位调制%光纤拉锥
光纖激光器%可切換多波長%相位調製%光纖拉錐
광섬격광기%가절환다파장%상위조제%광섬랍추
fiber laser%switchable multi-wavelength%phase modulation%fiber taper
研究了一种全光纤可切换多波长掺铒光纤激光器。该激光器利用一段缠绕在压电陶瓷上的单模光纤作为正弦相位调制器以及基于光纤拉锥的马赫-曾德尔干涉仪作为梳状滤波器,抑制由于掺铒光纤的均匀展宽效应引起的模式竞争,从而避免了在室温下不稳定的单波长激射,实现了多波长掺铒光纤激光器的稳定输出。实验中观察到稳定的5个波长的同时激射,相邻波长间隔为0.804 nm。信噪比大于40 dB,3 dB带宽约为0.023 nm,中心5个波长输出功率的平坦度为14 dB。同时,激光器具有灵活的波长可切换特性,通过调整驱动信号和偏振控制器的状态,实现了单波长、双波长、三波长以及更多波长的输出。该激光器可应用于大容量波分复用系统和光纤传感。
研究瞭一種全光纖可切換多波長摻鉺光纖激光器。該激光器利用一段纏繞在壓電陶瓷上的單模光纖作為正絃相位調製器以及基于光纖拉錐的馬赫-曾德爾榦涉儀作為梳狀濾波器,抑製由于摻鉺光纖的均勻展寬效應引起的模式競爭,從而避免瞭在室溫下不穩定的單波長激射,實現瞭多波長摻鉺光纖激光器的穩定輸齣。實驗中觀察到穩定的5箇波長的同時激射,相鄰波長間隔為0.804 nm。信譟比大于40 dB,3 dB帶寬約為0.023 nm,中心5箇波長輸齣功率的平坦度為14 dB。同時,激光器具有靈活的波長可切換特性,通過調整驅動信號和偏振控製器的狀態,實現瞭單波長、雙波長、三波長以及更多波長的輸齣。該激光器可應用于大容量波分複用繫統和光纖傳感。
연구료일충전광섬가절환다파장참이광섬격광기。해격광기이용일단전요재압전도자상적단모광섬작위정현상위조제기이급기우광섬랍추적마혁-증덕이간섭의작위소상려파기,억제유우참이광섬적균균전관효응인기적모식경쟁,종이피면료재실온하불은정적단파장격사,실현료다파장참이광섬격광기적은정수출。실험중관찰도은정적5개파장적동시격사,상린파장간격위0.804 nm。신조비대우40 dB,3 dB대관약위0.023 nm,중심5개파장수출공솔적평탄도위14 dB。동시,격광기구유령활적파장가절환특성,통과조정구동신호화편진공제기적상태,실현료단파장、쌍파장、삼파장이급경다파장적수출。해격광기가응용우대용량파분복용계통화광섬전감。
An all-fiber switchable multi-wavelength erbium fiber laser was proposed in this paper. A sinusoidal phase modulator composed of a piece of single-mode fiber around a piezoelectric transducer was inserted in the ring cavity, combined with an all-fiber Mach-Zehnder interferometer based on cascade in-line two-taper as the comb filter, which suppressed the mode competition owing to the homogeneous broaden line in erbium-doped fiber and eliminated the unstable wavelength lasing. Simultaneous and stable five-wavelength lasing was observed with 0.804 nm intervals at room temperature. The signal to noise ratio is higher than 40 dB, the 3 dB bandwidth is about 0.023 nm, and the five lasing lines in power differences are less than 14 dB. Meanwhile, the laser has highly flexible wavelength switchable property. By adjusting the driving signal and polarization controller, single wavelength lasing output, switchable dual, triple and ever more wavelengths lasing output could be realized. These advantages enable this laser as a potential candidate for high-capacity wavelength division multiplexing systems and mechanical sensors.