共查询到18条相似文献,搜索用时 156 毫秒
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报道了利用光纤的非线性偏振旋转效应产生可饱和吸收体的锁模机制,从掺Er3+光纤环形腔激光器中产生稳定的高阶谐波锁模光脉冲的实验研究结果(限于示波器带宽,实验中最高曾测量到稳定的4076MHz重复频率的谐波锁模光脉冲).实验中发现有三种不同的演化方式产生高阶谐波锁模光脉冲,还观察到在8352MHz谐波锁模光脉冲的光谱中出现孤子光谱边带.四阶谐波锁模(8352MHz重复频率)超短光脉冲经过6m长高掺杂浓度的掺Er3+光纤放大器放大后产生了平均输出功率1388mW,脉宽201fs,中心波长1531μm,单脉冲能
关键词: 相似文献
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双波长飞秒激光器量子理论研究 总被引:2,自引:0,他引:2
本文建立了一个不涉及具体光腔结构的双波长固体飞秒激光器模型,分析了群达弥散(GVD)、自相位调制(SPM)、交叉耦合、损耗调制和增益放大的动态平衡过程.从场算符的定义出发,导出了双波长飞秒激光器的量子锁模方程组,并且将该量子销模方程组化为经典锁模方程组.结果表明,该方程组和非线性薛定谔方程有着类似的结构,方程组存在稳定的脉冲解,因而从理论上证明了双波长飞秒激光器可以实现双波长同时锁模. 相似文献
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An improved harmonic mode-locked Semiconductor optical amplifier (SOA) fiber ring lasers has been presented and numerically investigated based on the self-reproduction theory. The numerical result shows that a narrower optical pulse train with a more symmetrical-temporal shape can be obtained, when the modulation SOA is DC biased on high current, whereas the gain SOA is DC biased on the low current functions as a gain compensator in the experimental setup. Also, the system parameters effects on the characteristic of the harmonic mode-locked pulse have been investigated. 相似文献
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本文采用双包层掺镱光纤作为增益介质,用单壁碳纳米管作为饱和吸收体,获得最高输出功率为336 mW的锁模脉冲激光.用飞秒激光诱导水击穿法直接在单模光纤上制备出D形区,通过在D形光纤上滴涂单壁碳纳米管溶液,成功制备出碳纳米管饱和吸收体,并对其饱和吸收特性进行测试,发现其调制深度为27%.利用该饱和吸收体作为锁模器件,制备出具有环形腔结构的锁模光纤激光器.当抽运功率为4W时,获得了脉宽为93.8 fs,中心波长为1083.8 nm,3 dB谱宽为8.6 nm,重复频率为5.59 MHz,平均功率为336 mW的飞秒脉冲激光输出. 相似文献
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F. Wang D. Z. Zhong Z. M. Wu G. Q. Xia R. F. Li 《International Journal of Infrared and Millimeter Waves》2006,27(12):1595-1601
Based on the self-reproduction theory, a rational harmonic mode-locked semiconductor optical amplifier fiber ring laser was
numerically investigated. The system parameters effects on pulse-amplitude equalization of rational harmonic mode locking
was analyzed and the numerical result shows that the 2∼5 order rational harmonic mode-locked pulse with the small amplitude
ripple can be obtained only by adjusting the system parameters. 相似文献
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We present a multi-wavelength mode-locked fiber ring laser incorporating a semiconductor optical amplifier (SOA) and a Fabry-Perot semiconductor optical amplifier (FP-SOA). Because the gain of the SOA is depleted by an external injection optical signal, the SOA acts as a loss modulator. The FP-SOA serves as a tunable comb filter. The presented laser source can generate 19 synchronized wavelength channels with the extinction ratio of about 21 dB, each mode-locked at 10 GHz, and mode-locked pulse width is about 40 ps. Oscillation wavelengths band can be tuned by adjusting the bias current of the SOA, and wavelength spacing also can be changed by using a tunable optical delay line (ODL) or a temperature controller. The polarization-insensitive devices ensure that the output power is rather stable. This fiber laser has potential applications in longer waveband (L-band) within the low-attenuation window. 相似文献
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Fei Wang 《Optics & Laser Technology》2011,43(4):848-851
A stable multiwavelength mode-locked semiconductor fiber ring laser incorporating a fiber Mach-Zehnder interferometer (MZI) filter was proposed and experimentally demonstrated. A semiconductor optical amplifier (SOA) serves as an optically controlled mode-locking element due to gain exhaustion caused by external injected optical pulses. Another SOA severs as a constant-gain medium. A fiber MZI filter with a temperature control is incorporated into the fiber ring cavity to acquire a stable and tunable multiwavelength oscillation. Twelve wavelengths are synchronously mode-locked at 10 GHz, pulse width of mode-locked pulse are about 30 ps. Proposed multiwavelength mode-locked semiconductor fiber ring laser has some distinct advantages, such as simple and compact structure, easy integration, convenient tuning, good stability, potential high repetition rate operating, which has potential application in the future WDM communication system. 相似文献
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L. M. Zhao D. Y. Tang T. H. Cheng C. Lu H. Y. Tam X. Q. Fu S. C. Wen 《Optical and Quantum Electronics》2008,40(13):1053-1064
We report on the experimental observation of passive harmonic mode locking of bunches of single-pulse solitons or twin-pulse
solitons in an Erbium-doped fiber ring laser. Experimental investigations on the phenomenon revealed that, although the soliton
interaction between the adjacent single-/twin-pulse solitons in a bunch is weaker than that of the pulse interaction in the
twin-pulse solitons, a soliton bunch could also function as a unit and form the state of passively harmonic mode-locking.
Harmonic mode-locking is one of the intrinsic characteristics of soliton emission in passively mode-locked fiber ring lasers.
It can be formed based on the single-pulse soliton, twin-pulse soliton, or bunch of solitons. 相似文献
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Closed-form analysis of pulse evolution in the transient regime in an actively modelocked internally frequency doubled broad-band
continuous wave laser is presented. The analysis enables investigation of the effect of nonlinear crystal inside the laser
cavity on mode-locked pulse parameters at the fundamental frequency. It is shown that the presence of internal second harmonic
crystal broadens the fundamental mode-locked pulse while accelerating the approach of the system to steady-state. The dependence
of pulse parameters on the bandwidth of the tuning element, modulation depth of the active mode-locker and conversion efficiency
of the frequency doubler is presented in detailed graphical form. 相似文献