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| 脉冲幅度均匀化的有理谐波锁模光纤激光器 | |
| 引用本文： | 俞力,宋跃江,张旭苹.脉冲幅度均匀化的有理谐波锁模光纤激光器[J].光学学报,2008,28(s1):14-17. |
| 作者姓名： | 俞力 宋跃江 张旭苹 |
| 作者单位： | 俞力:南京大学光通信工程研究中心, 南京 江苏 210093 宋跃江:南京大学光通信工程研究中心, 南京 江苏 210093 张旭苹:南京大学光通信工程研究中心, 南京 江苏 210093 |
| 基金项目： | 国家自然科学基金(60644001)资助课题。 |
| 摘 要： | 提出并实现了一种脉冲幅度可均匀化的有理谐波锁模光纤激光器。该激光器采用主动有理谐波锁模机制,可获得重复频率为整数倍调制频率的锁模脉冲信号。通过在光纤激光器谐振腔中添加非线性光纤放大环镜,并利用其反射率对输入信号强度的开关特性,实现对锁模脉冲信号的整幅。在1 GHz的调制频率下,分别获得了4 GHz和5 GHz重复频率的锁模脉冲信号输出,并且在一定的980 nm抽运功率下,可通过调节电光调制器的直流偏置电压大小以及调制信号的调制深度,使得脉冲幅度具有较好的均匀性。 |
| 关 键 词： | 光纤激光器 主动谐波锁模 有理谐波锁模 非线性光纤放大环镜 |
Pulse-Amplitude Equalization by Nonlinear-Amplified-Loop Mirror in Rational Harmonic Mode-Locked Fiber Laser |
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| Abstract: | Pulse-amplitude equalization through a nonlinear-amplifier-loop mirror in active rational harmonic mode-locked fiber laser is designed and experimentally demonstrated. An optical pulse train with a high repetition rate is generated when the modulation frequency is tuned to a rational number of the cavity's fundamental frequency of the fiber laser. Through incorporating a nonlinear-amplifier-loop mirror into the cavity, the pulse train can be equalized by adjusting the DC biased voltage and the modulation depth. At the modulation frequency of 1 GHz, an amplitude-equalization pulse train with repetition rate of 4 GHz or 5 GHz is obtained. |
| Keywords: | fiber laser active harmonic mode locking rational harmonic mode locking nonlinear amplifier loop mirror |