光学相位擦除及其在周期极化铌酸锂中通过级联二阶过程进行格式转换的应用。

Optical phase erasure and its application to format conversion through cascaded second-order processes in periodically poled lithium niobate.

作者信息

Wang Jian, Sun Junqiang, Zhang Xinliang, Huang Dexiu, Fejer M M

机构信息

Wuhan National Laboratory for Optoelectronics, College of Optelectronic Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, China.

出版信息

Opt Lett. 2008 Aug 15;33(16):1804-6. doi: 10.1364/ol.33.001804.

DOI:10.1364/ol.33.001804

PMID:18709093

Abstract

We describe a new optical phase erasure characteristic of periodically poled lithium niobate (PPLN) by using cascaded second-harmonic generation and difference-frequency generation with the signal set at the quasi-phase-matching wavelength. A simple analytical expression is derived clearly explaining the operation principle. It is interesting that the optical phase erasure feature enables an all-optical format conversion from carrier-suppressed return to zero (CSRZ) to return to zero (RZ). We experimentally and theoretically demonstrate a PPLN-based 40 Gbits/s all-optical CSRZ-to-RZ format conversion. Moreover, tunable and multicasting CSRZ-to-RZ format conversions are also verified in the experiment.

摘要

我们描述了一种通过使用级联二次谐波产生和差频产生（信号设置在准相位匹配波长）来实现周期性极化铌酸锂（PPLN）的新型光学相位擦除特性。推导了一个简单的解析表达式，清晰地解释了其工作原理。有趣的是，这种光学相位擦除特性能够实现从载波抑制归零（CSRZ）到归零（RZ）的全光格式转换。我们通过实验和理论证明了基于PPLN的40 Gbit/s全光CSRZ到RZ格式转换。此外，实验中还验证了可调谐和多播CSRZ到RZ格式转换。