中国物理B ›› 2019, Vol. 28 ›› Issue (6): 64206-064206.doi: 10.1088/1674-1056/28/6/064206

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Analysis of third and one-third harmonic generation in lossy waveguides

Jianyu Zhang(张剑宇), Yunxu Sun(孙云旭), Qinghai Song(宋清海)   

  1. 1 Department of Electronic and Information Engineering, Harbin Institute of Technology(Shenzhen), Shenzhen 518055, China;
    2 Department of Science, Harbin Institute of Technology(Shenzhen), Shenzhen 518055, China
  • 收稿日期:2019-01-15 修回日期:2019-03-15 出版日期:2019-06-05 发布日期:2019-06-05
  • 通讯作者: Yunxu Sun E-mail:sunyunxu@hit.edu.cn
  • 基金资助:

    Project supported by Shenzhen Municipal Science and Technology Plan Project, China (Grant Nos. JCYJ20160427183803458 and JCYJ20150403161923546).

Analysis of third and one-third harmonic generation in lossy waveguides

Jianyu Zhang(张剑宇)1, Yunxu Sun(孙云旭)1, Qinghai Song(宋清海)2   

  1. 1 Department of Electronic and Information Engineering, Harbin Institute of Technology(Shenzhen), Shenzhen 518055, China;
    2 Department of Science, Harbin Institute of Technology(Shenzhen), Shenzhen 518055, China
  • Received:2019-01-15 Revised:2019-03-15 Online:2019-06-05 Published:2019-06-05
  • Contact: Yunxu Sun E-mail:sunyunxu@hit.edu.cn
  • Supported by:

    Project supported by Shenzhen Municipal Science and Technology Plan Project, China (Grant Nos. JCYJ20160427183803458 and JCYJ20150403161923546).

摘要:

A comprehensive study on the requirements for the highly efficient third harmonic generation (THG) and its inverse process, one-third harmonic generation (OTHG), in lossy waveguides is proposed. The field intensity restrictions for both THG and OTHG caused by loss are demonstrated. The effective relative phase ranges, supporting the positive growth of signal fields of THG and OTHG are shrunken by the loss. Furthermore, it turns out that the effective relative phase ranges depend on the intensities of the interacting fields. At last, a modified definition of coherent length in loss situation, which evaluates the phase matching degree more precisely, is proposed by incorporating the shrunken relative phase range and the nonlinear phase mismatch. These theoretical analysis are valuable for guiding the experimental designs for highly efficient THG and OTHG.

关键词: coupled mode theory, third harmonic generation, one-third harmonic generation, loss effects

Abstract:

A comprehensive study on the requirements for the highly efficient third harmonic generation (THG) and its inverse process, one-third harmonic generation (OTHG), in lossy waveguides is proposed. The field intensity restrictions for both THG and OTHG caused by loss are demonstrated. The effective relative phase ranges, supporting the positive growth of signal fields of THG and OTHG are shrunken by the loss. Furthermore, it turns out that the effective relative phase ranges depend on the intensities of the interacting fields. At last, a modified definition of coherent length in loss situation, which evaluates the phase matching degree more precisely, is proposed by incorporating the shrunken relative phase range and the nonlinear phase mismatch. These theoretical analysis are valuable for guiding the experimental designs for highly efficient THG and OTHG.

Key words: coupled mode theory, third harmonic generation, one-third harmonic generation, loss effects

中图分类号:  (Nonlinear optics)

  • 42.65.-k
42.65.Wi (Nonlinear waveguides) 42.65.Lm (Parametric down conversion and production of entangled photons)