A Wavelength Tunable CW Orange-red Laser Source Based on Magnesium Oxide-doped Periodically-poled LiNbO3 in an Intracavity Sum-frequency Generation

Authors

  • Yang BAI Northwest University
  • Jianlin LI Northwest University
  • Guangzhi LEI Xi’an Institute of Optics and Precision Mechanics of CAS
  • Lei HOU Northwest University
  • Rongwei ZHA Northwest University
  • Yi WANG Northwest University
  • Haowei CHEN Northwest University

DOI:

https://doi.org/10.5755/j01.ms.26.4.22640

Keywords:

wavelength tuning, orange-red laser, composite cavity, signal SRO, intracavity SFG

Abstract

A watt-level continuous wave (CW) orange-red laser with wavelength tunable properties is experimentally implemented based on sum-frequency generation (SFG) in a composite cavity. The cavity is composed of an 880 nm laser diode (LD) side-pumped Nd: GdVO4 p-polarized 1062.9 nm cavity and a single-resonant optical parametric oscillator (SRO) of signal light using a magnesium oxide-doped periodically-poled LiNbO3 (MgO: PPLN) crystal with a poling period of 29.1 μm. In the overlap region of the two cavities, orange-red laser is generated by using a type-II critical phase-matched potassium titanyl phosphate crystal (KTP) crystal. In the temperature tuning range of the MgO: PPLN crystal (from 30 °C to 200 °C), the CW orange-red laser beams are generated in a tunable waveband from 612.24 nm to 620.72 nm (Δλ = 8.48 nm), corresponding to the mid-infrared idler light is also obtained with tunable wavelength from 4027.5 nm to 3708.2 nm (Δλ = 319.3 nm). At the lowest tuning temperature of 30 °C, the maximum CW output power of the orange-red laser at 612.24 nm and the idler light at 4027.5 nm are obtained, which are 1.145 W and 2.83 W, respectively.

Author Biographies

Yang BAI, Northwest University

光子学与光学技术研究所

Jianlin LI, Northwest University

光子学与光学技术研究所

Guangzhi LEI, Xi’an Institute of Optics and Precision Mechanics of CAS

空间光学技术研究部

Lei HOU, Northwest University

光子学与光学技术研究所

Rongwei ZHA, Northwest University

光子学与光学技术研究所

Yi WANG, Northwest University

Institute of Photonics and Photo-Technology

Haowei CHEN, Northwest University

Institute of Photonics and Photo-Technology

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Published

2020-09-01

Issue

Section

ELECTRONIC AND OPTICAL MATERIALS