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首页> 外文期刊>Optics & Laser Technology >Active bandwidth control of external-cavity system for improving mode-hop-free synchronous tuning characteristics of an external-cavity diode laser
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Active bandwidth control of external-cavity system for improving mode-hop-free synchronous tuning characteristics of an external-cavity diode laser

机译：外腔系统的主动带宽控制改善外腔二极管激光器的无循环同步调谐特性

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摘要

The mode-hop-free (MHF) tuning range and wavelength tuning rate are two critical characteristics for an external-cavity diode laser (ECDL). On the premise of stable dynamic response of the external-cavity system inherent in the ECDL, a wide MHF tuning range can be guaranteed by using the synchronous tuning principle. However, when high-frequency tuning, the mechanical vibration of the external-cavity system is excited due to limited system bandwidth, which will break the mode-matching of the internal and external-cavity and greatly decrease the MHF tuning range. Therefore, the system bandwidth of the external-cavity limits the tuning frequency and thus the wavelength tuning rate. In order to obtain a wide MHF range at high-frequency tuning, we used an active bandwidth control method with a resistance-capacitance (RC) filter to increase the system bandwidth and suppress the dynamic vibration of the external-cavity. With the RC filter, the system bandwidth of the external-cavity was increased from 290 rad/s to 5012 rad/s, an improvement of 17 times. The experimental results indicated that the MHF range at high-frequency tuning was significantly improved and a maximum wavelength tuning rate of 18.6 THz/s was obtained at tuning frequency of 100 Hz.
机译：无峰值（MHF）调谐范围和波长调谐速率是外腔二极管激光器（ECDL）的两个关键特性。在ECDL固有的外腔系统的稳定动态响应的前提下，可以使用同步调谐原理保证宽的MHF调谐范围。然而，当高频调谐时，由于系统带宽有限，外腔系统的机械振动是兴奋的，这将破坏内部和外腔的模式匹配，并且大大降低MHF调谐范围。因此，外腔的系统带宽限制了调谐频率并因此限制了波长调谐速率。为了在高频调谐时获得宽的MHF范围，我们使用了具有电阻电容（RC）滤波器的有源带宽控制方法，以增加系统带宽并抑制外腔的动态振动。通过RC滤波器，外腔的系统带宽从290 rad / s增加到5012 rad / s，提高了17次。实验结果表明，高频调谐的MHF范围显着提高，最大波长调谐率为18.6至3 / s，在调谐频率为100Hz。

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  • 来源
    《Optics & Laser Technology》 |2020年第2020期|共10页
  • 作者

    Zhu Yu; Liu Zhigang; Zhang Xin; Zhen Zhilong; Tian Kai; Jing Tao;

  • 作者单位

    Xi An Jiao Tong Univ Educ Minist Modern Design &

    Rotor Bearing Syst Key Lab Xian 710049 Peoples R China;

    Xi An Jiao Tong Univ Educ Minist Modern Design &

    Rotor Bearing Syst Key Lab Xian 710049 Peoples R China;

    Xi An Jiao Tong Univ Educ Minist Modern Design &

    Rotor Bearing Syst Key Lab Xian 710049 Peoples R China;

    Xi An Jiao Tong Univ Educ Minist Modern Design &

    Rotor Bearing Syst Key Lab Xian 710049 Peoples R China;

    Xi An Jiao Tong Univ Educ Minist Modern Design &

    Rotor Bearing Syst Key Lab Xian 710049 Peoples R China;

    Xi An Jiao Tong Univ Educ Minist Modern Design &

    Rotor Bearing Syst Key Lab Xian 710049 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 光学;
  • 关键词

    External-cavity diode laser (ECDL); Mode-hop-free (MHF); Wavelength tuning rate; Resistance-capacitance (RC) filter; Bandwidth control;

    机译：外腔二极管激光器（ECDL）;无模式（MHF）;波长调谐速率;电阻 - 电容（RC）滤波器;带宽控制;

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