共查询到18条相似文献,搜索用时 125 毫秒
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介绍一种简单的以自激注入锁定方式、生成边模抑制比改善的、可调谐双波长超短光脉冲的实验系统.系统通过调整两个Bragg光纤光栅和光延迟线,可方便地调谐两个不同波长及其间距,从而获得双波长光脉冲输出.实验显示,在20.7nm的波长调谐范围内,可获得边模抑制比接近或高于30dB的双波长光脉冲输出.系统简单,且波长调谐方便. 相似文献
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本文报道了没有纵模匹配的注入锁定短脉冲染料激光器.实验结果表明,该激光器系统具有波长连续可调谐,脉冲短,输出线宽窄,功率高等特点. 相似文献
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研究了掺铒光纤环形腔激光器(EDFRL)的注入锁定现象,提出了一种实现可调谐的单纵模EDFRL波长及功率稳定的新方法,即利用注入锁定技术向法布里-珀罗可调滤波器结合复合腔结构的EDFRL腔内注入低功率的连续光,使某一纵模在注入连续光的基础上起振.这个纵模在对增益介质的竞争中可以稳定地占据优势,从而与注入信号发生锁定,实现激光器输出光谱的稳定.实验得到激光器在1527.4~1561.9 nm范围内波长可调,输出功率>0.6 dBm,信噪比(SNR)>43 dB;输出光波长与功率抖动分别<0.01 nm和≤0.02 dB,且线宽约为1.4 kHz. 相似文献
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研究了掺铒光纤环形腔激光器(EDFRL)的注入锁定现象,提出了一种实现可调谐的单纵模EDFRL波长及功率稳定的新方法,即利用注入锁定技术向法布里-珀罗可调滤波器结合复合腔结构的EDFRL腔内注入低功率的连续光,使某一纵模在注入连续光的基础上起振.这个纵模在对增益介质的竞争中可以稳定地占据优势,从而与注入信号发生锁定,实现激光器输出光谱的稳定.实验得到激光器在1527.4~1561.9 nm范围内波长可调,输出功率>0.6 dBm,信噪比(SNR)>43 dB;输出光波长与功率抖动分别<0.01 nm和≤0.02 dB,且线宽约为1.4 kHz. 相似文献
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陈长水 《激光与光电子学进展》2001,(9):7
采用腔内分束调谐系统在腔内分别调谐控制两路基波光束,获得分别独立调谐的双波长双脉冲基波光束输出;接着利用一块BBO谐波晶体腔内同时倍频(900 nm附近)双波长基波光脉冲,获得450 nm附近可调谐输出的双波长双脉冲二次谐波光脉冲;再在腔内插入另一块三次谐波BBO晶体,经调整后,获得300 nm附近可调谐输出的双波长双脉冲三次谐波光脉冲;利用一块四次谐波BBO晶体腔外倍频450 nm附近输出的双波长双脉冲激光束,经腔外合束系统合束,获得225 nm附近双波长双脉冲激光束;利用获得的双波长双脉冲Cr∶LiSAF二次、三次、四次谐波激光束实际测量了空气中NO、NO2、SO2气体的含量,获得了很高的测量精度.(OB2) 相似文献
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半导体激光器生成双波长超窄脉冲的实验研究 总被引:1,自引:0,他引:1
描述了一种用腔外注入方式调制增益的法布里珀罗半导体激光器产生双波长超窄脉冲的简单方法,腔外注入功能部分包含一个直流工作的法面里珀罗半导体激光器,一个3dB光耦合器和两个布喇格型光纤光栅。双波长的选择和间距通过调节光栅为实现,文中描述的系统实现了在10nm的调节范围内边模压制率优于17dB的理想结果。整个系统简单、成本低。 相似文献
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Yi-Ping Wang Wang D.N. Wei Jin Xiao-Hui Fang 《Quantum Electronics, IEEE Journal of》2006,42(9):868-872
A simple continuously wavelength-tunable fiber ring laser pulse source is demonstrated. Such a source employs a gain-switched multiple quantum-well Fabry-Perot laser diode in a self-seeding scheme and the output pulse wavelength can be tuned continuously via a tunable optical filter. The optical pulses generated exhibit a pulsewidth of 92 ps at the frequency of 2.6 GHz. Within a wide wavelength tuning range of 46 nm, the side-mode suppression ratio and the average power of the output optical pulses obtained are higher than 50.1 dB and 3.3 dBm, respectively, and the pulse spectral stability can be maintained in the whole wavelength tuning range. 相似文献
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L. Schares L. Occhi G. Guekos 《Photonics Technology Letters, IEEE》2003,15(10):1348-1350
The authors present a novel scheme to generate ultrahigh repetition rate picosecond pulses synchronized to an optical pulse stream in an actively mode-locked fiber ring laser. A monolithic Mach-Zehnder interferometer with integrated semiconductor optical amplifiers serves as an 80-GHz optically controlled modulator. 80-GHz transform-limited 2.1-ps Gaussian pulse with low timing jitter, extinction ratios up to 25 dB, and 5 mW of average output power are demonstrated. The laser is wavelength tunable over more than 15 nm around 1555 nm. At 160 GHz, 2.5-ps pulse trains with 3-mW output power are generated by rational harmonic mode locking. 相似文献
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Xiaohui Fang D.N. Wang 《Photonics Technology Letters, IEEE》2003,15(6):855-857
A mutual pulse injection-seeding scheme is developed to produce wavelength-tunable optical short pulses by the use of two Fabry-Perot laser diodes, of which one is gain-switched and the other is dc biased. Wavelength tuning of the optical pulses is achieved by simply adjusting a tunable optical filter while maintaining a constant repetition frequency of 3.0 GHz. The sidemode suppression ratio obtained is more than 30 dB over the wavelength-tuning range of 19 nm. The system is simple and robust. 相似文献
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Tunable dual-wavelength picosecond pulse generation using multiple-optical-path self-seeding approach 总被引:4,自引:0,他引:4
D.N. Wang C. Shu 《Photonics Technology Letters, IEEE》1997,9(9):1211-1213
A simple system is developed to generate tunable dual-wavelength optical pulses by self-injection seeding of a laser diode. The wavelengths are selected by controlling two light paths incident on a single diffraction grating. The spectral separation has been tuned from 1.8 to 16.1 nm while maintaining an output side-mode-suppression-ratio (SMSR) over 21 dB. This multiple-optical-path self-seeding approach is simple and efficient, thus providing an attractive alternative to generate tunable multiwavelength pulses. 相似文献
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Error-free, tunable optical frequency conversion of a transform-limited 4.0 ps optical pulse signal is demonstrated at 6.3 Gbit/s using four-wave mixing in a polarisation-maintaining optical fibre. The process generates 4.0-4.6 ps pulses over a 25 nm range with time-bandwidth products of 0.31-0.43 and conversion power penalties of less than 1.5 dB 相似文献
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The authors report the generation of 20 GHz, 3.0-3.5 ps transform-limited optical pulses across the wavelength tunable range 1550-1557 nm using a wavelength tunable, polarisation-maintaining actively modelocked Er/sup 3+/-doped fibre ring laser. Stable bit-error-free modelocking operation is confirmed throughout the wavelength tuning range.<> 相似文献
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提出了一种基于M-Z结构的可调谐掺铒光纤随机激光器,并对随机激光输出过程、随机激光的波长可调谐输出以及随机激光的稳定性进行了实验研究。通过采用光纤熔接手段将两个2×2光纤耦合器进行熔接,构成全光纤M-Z滤波结构。实验结果表明,激光器的阈值功率为120mW,调整可调谐衰减器改变增益损耗,实现波长可调谐输出,其中单波长输出分别为1554.4,1555.2和1556.3nm,信噪比达到31.65dB;双波长输出分别为1525.9,1556.2和1531.6,1556.2nm,信噪比优于21.92dB;三波长输出分别为1527.4,1546.9,1551.6和1526.9,1530.0,1549.8nm,信噪比优于20.10dB;四波长输出为1525.9,1530.1,1547.9和1552.3nm,信噪比优于18.95dB;其中单波长和双波长的功率波动分别优于1.65和1.99dB;激光器斜率效率为0.627%。 相似文献