近红外高速皮秒激光器的研制

新兴的量子密码技术对激光器提出了新的要求。为了满足要求,设计了一种高速内调制半导体激光器。利用专门设计的脉冲整形电路,将输入的触发信号经过扇出电路分成两路,分别经过延时电路产生不同的延时,利用逻辑电路将两路信号转换成窄脉冲信号,通过射频放大电路驱动激光器发光,使输出光脉冲频率达到1 GHz, 脉冲宽度小于24 ps, 时间抖动小于12 ps, -10 dB谱线宽度仅0.7 nm, 输出光波长和功率稳定性高。所研制激光器可满足频率达1 GHz的高速量子密钥分配的需求。

Abstract

The emerging quantum cryptography technology puts forward new requirements for lasers. To meet the requirements, an internal modulated semiconductor laser with high speed is developed. By using a special pulse shaping circuit designed, an input trigger pulse is divided into two pulses by a fan-out circuit. The two pulses pass through a delay circuit to produce different delay. The two signals are turned into a short pulse signal by a logic circuit. An RF amplifying circuit is used to drive a laser diode. The output laser pulse frequency can reach 1 GHz, the pulse width is less than 24 ps, time jitter is less than 12 ps and the -10 dB spectrum width is only 0.7 nm. Wavelength and power of the output laser have high stability. The laser designed can meet the requirements of a high-speed quantum key distribution with 1 GHz frequency.

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刘云, 吕利影, 苗春华, 尹凯, 刘婧婧, 何德勇. 近红外高速皮秒激光器的研制[J]. 量子电子学报, 2017, 34(1): 32. LIU Yun, LV Liying, MIAO Chunhua, YIN Kai, LIU Jingjing, HE Deyong. Design of near infrared high-speed picosecond lasers[J]. Chinese Journal of Quantum Electronics, 2017, 34(1): 32.

近红外高速皮秒激光器的研制

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