Flat broad-band wavelength conversion based on sinusoidally chirped optical superlattices in lithium niobate

被引：49
作者：
Gao, SM [1 ]
Yang, CX [1 ]
Jin, GF [1 ]
机构：
[1] Tsing Hua Univ, State Key Lab Precis Measurement Technol & Instru, Beijing 100084, Peoples R China
来源：
IEEE PHOTONICS TECHNOLOGY LETTERS | 2004年 / 16卷 / 02期
关键词：
nonlinear optics; optical fiber communications; optical frequency conversion; wavelength conversion;
D O I：
10.1109/LPT.2003.823102
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We report the enhancement of the bandwidth and the response flatness of wavelength conversion through cascaded second-order nonlinear processes by sinusoidally chirped optical superlattices (SCOSs) in lithium niobate crystal. The conversion bandwidth of the SCOS is significantly larger than that of uniform and segmented gratings. The SCOS shows very flat conversion response in the 1.5-mum region. The physical origin of the bandwidth enhancement is ascribed to the plentiful reciprocal wave vectors of the SCOS, which provide enough momenta to simultaneously satisfy quasi-phase matching conditions for both second-harmonic generation and difference-frequency generation.
引用
收藏
页码：557 / 559
页数：3
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