Mode-hop-free electro-optically tuned external-cavity diode laser using volume Bragg grating and PLZT ceramic.
Mode-hop-free electro-optically tuned external-cavity diode laser using volume Bragg grating and PLZT ceramic.
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DOI：
10.1364/oe.19.017244
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发表时间：
2011-08
期刊：
影响因子：
3.8
通讯作者：
Li Shen;Q. Ye;H. Cai;R. Qu
中科院分区：
文献类型：
--
作者：
Li Shen;Q. Ye;H. Cai;R. Qu
提出了一种新型的电光调谐外腔半导体激光器（ECDL），它采用体布拉格光栅（VBG）作为频率选择反馈元件，采用高电光系数锆钛酸铅镧（PLZT）透明陶瓷作为频率调谐元件。通过调节施加在PLZT上的电压，实现了2.5GHz的单模频率调谐范围，没有模式跳变。激光波长约为810.0nm，线宽为19MHz，边模抑制比（SMSR）为37dB。结合VBG和PLZT透明电光陶瓷的优点是激光频率可以在纵向模式间隔范围内精细和快速地调谐而没有模式跳跃。此外，通过改变入射光束的角度，还可以实现32.7GHz的宽范围频率粗调。
We present a novel electro-optically tuned external-cavity diode laser (ECDL) that utilizes a volume Bragg grating (VBG) as the frequency selective feedback element and a piece of high electro-optic coefficient Lead Lanthanum Zirconate Titanate (PLZT) transparent ceramic as the frequency tuning element. By adjusting the voltage applied onto the PLZT, a single-mode frequency tuning range of 2.5GHz without mode hoping is achieved. The laser wavelength is around 810.0nm with the line-width of 19MHz and the side mode suppression ratio (SMSR) of 37dB. The advantages of combining a VBG and PLZT transparent electro-optic ceramic is that the laser frequency can be tuned finely and rapidly in a range of longitudinal mode spacing without mode hoping. Moreover, the wide-range coarse frequency tuning of 32.7 GHz can also be realized by changing the angle of incident light beam.