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

doi:10.1088/1674-1056/28/6/064206

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.

Keywords: coupled mode theory third harmonic generation one-third harmonic generation loss effects

Received: 15 January 2019
Revised: 15 March 2019
Accepted manuscript online:

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

Fund:

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

Corresponding Authors: Yunxu Sun
E-mail: sunyunxu@hit.edu.cn

Cite this article:

Jianyu Zhang(张剑宇), Yunxu Sun(孙云旭), Qinghai Song(宋清海) Analysis of third and one-third harmonic generation in lossy waveguides 2019 Chin. Phys. B 28 064206

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

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