Widely tunable laser frequency offset lock with 30 GHz range and 5 THz offset.
Widely tunable laser frequency offset lock with 30 GHz range and 5 THz offset.
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DOI：
10.1364/oe.21.014008
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发表时间：
2013-06
期刊：
影响因子：
3.8
通讯作者：
J. Biesheuvel;D. Noom;E. Salumbides;K. Sheridan;W. Ubachs;J. Koelemeij
中科院分区：
文献类型：
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作者：
J. Biesheuvel;D. Noom;E. Salumbides;K. Sheridan;W. Ubachs;J. Koelemeij
我们展示了一种简单而通用的方法，大大扩展了光频移器件，如声光调制器（AOM）的调谐范围。我们使用这种方法来稳定的可调谐窄带连续波（CW）激光器的频率的传输最大值的外部法布里-珀罗干涉仪（FPI）与可调频率偏移。这是通过一个伺服回路，其中包含一个环内AOM的简单的射频（RF）调谐的光频率在整个30 GHz的模式跳频的CW激光器的调谐范围。通过将FPI的长度稳定到稳定的氦氖（HeNe）激光器（在从可调谐激光器偏移5 THz处），我们同时将HeNe激光器的~ 1 MHz绝对频率稳定性转移到可调谐激光器的整个30 GHz范围。因此，我们的方法允许简单，宽范围，快速和可再现的光频率调谐和绝对光频率测量通过RF电子，这是在这里证明了重复记录27 GHz宽的分子碘光谱扫描速率高达500 MHz/s。一般的技术方面，确定该方法的性能进行了详细讨论。
We demonstrate a simple and versatile method to greatly extend the tuning range of optical frequency shifting devices, such as acousto-optic modulators (AOMs). We use this method to stabilize the frequency of a tunable narrow-band continuous-wave (CW) laser to a transmission maximum of an external Fabry-Perot interferometer (FPI) with a tunable frequency offset. This is achieved through a servo loop which contains an in-loop AOM for simple radiofrequency (RF) tuning of the optical frequency over the full 30 GHz mode-hop-free tuning range of the CW laser. By stabilizing the length of the FPI to a stabilized helium-neon (HeNe) laser (at 5 THz offset from the tunable laser) we simultaneously transfer the ~ 1 MHz absolute frequency stability of the HeNe laser to the entire 30 GHz range of the tunable laser. Thus, our method allows simple, wide-range, fast and reproducible optical frequency tuning and absolute optical frequency measurements through RF electronics, which is here demonstrated by repeatedly recording a 27-GHz-wide molecular iodine spectrum at scan rates up to 500 MHz/s. General technical aspects that determine the performance of the method are discussed in detail.