Optical single sideband modulation with tunable optical carrier-to-sideband ratio using a modulator in a Sagnac loop

Optical single sideband modulation with tunable optical carrier-to-sideband ratio using a modulator in a Sagnac loop
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使用萨尼亚克环路中的调制器进行具有可调谐光载波边带比的光单边带调制

DOI:
10.1016/j.optlastec.2016.12.006
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发表时间:
2017-06
影响因子:
5
通讯作者:
Jian Shuisheng
Jian Shuisheng
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Wu Beilei;Wang Muguang;Tang Yu;Sun Jian;Zhang Jing;Yan Fengping;Jian Shuisheng

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我们提出并实验证明了一种基于双向使用OSSB调制器实现具有可调光载波与边带比(OCSR)的光单边带(OSSB)调制的经济有效方法。提出的方案的关键概念是使用一个OSSB调制器,该调制器集成在Sagnac环中,其中光波沿顺时针方向以SSB调制的形式调制,而正交光由于速度不匹配而不沿逆时针方向调制。沿着两个方向的信号通过偏振分束器(PBS)在Sagnac环路的输出端组合在一起。从而得到了部分正交SSB (PO-SSB)调制信号。产生的信号随后被送入偏振控制器(PC),然后是偏振器。在实验中通过调节PC实现了OCSR在−10 ~ 27db范围内可调的ossb调制信号。该方案是波长无关的,可以支持低微波带宽,实现灵活的波长可调性。
We propose and experimentally demonstrate a cost-effective approach to achieve optical single sideband (OSSB) modulation with tunable optical carrier-to-sideband ratio (OCSR) based on a bi-directional use of an OSSB modulator. The key concept of the proposed scheme is to use an OSSB modulator which is incorporated in a Sagnac loop where a light wave is modulated in the form of SSB modulation along the clock-wise direction while the orthogonal light is not modulated along the counter clock-wise direction due to the velocity mismatch. The signals along two directions are combined together at the output of the Sagnac loop via a polarization beam splitter (PBS). Thus a partial orthogonal SSB (PO-SSB) modulated signal is obtained. The generated signal is then sent into a polarization controller (PC) followed by a polarizer. An OSSB-modulated signal with tunable OCSR from −10 to 27 dB is achieved by adjusting the PC in the experiment. The proposed scheme is wavelength independent, which can support low microwave bandwidth and achieve flexible wavelength tunability.
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