Influence of the pump scheme on the output power and the intensity noise of a single-frequency continuous-wave laser

被引：14

作者：

Guo, Yongrui ^{[1
]}

Peng, Weina ^{[1
]}

Su, Jing ^{[1
,2
]}

Lu, Huadong ^{[1
,2
]}

Peng, Kunchi ^{[1
,2
]}

机构：

[1] Shanxi Univ, Inst Optoelect, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan 030006, Peoples R China

[2] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Peoples R China

来源：

OPTICS EXPRESS | 2020年 / 28卷 / 04期

关键词：

HIGH-EFFICIENCY; MODE; DEPENDENCE; AMPLIFIER;

D O I：

10.1364/OE.387392

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The influence of the pump scheme on the intensity noise of the single-frequency continuous-wave (CW) laser is investigated in this paper, which is implemented in a single-frequency CW Nd:YVO4 1064 nm laser by comparing the traditional 808 nm pumping scheme (TPS) to the direct 888 nm pumping scheme (DPS). Under the conditions that the lasers with TPS and DPS have the same cavity structure and the cavity mirrors, as well as the same operation state including the thermal lens of the laser crystals and the mode-matching between the pump laser mode and the laser cavity mode at the laser crystals, the output power of the laser with DPS is up-to 32.0 W, which is far higher than that of 21.1 W for the laser with TPS. However, the intensity noise of the DPS laser including resonant relaxation oscillation (RRO) frequency of 809 kHz, RRO peak amplitude of 31.6 dB/Hz above the shot noise level (SNL) and the SNL cutoff frequency of 4.2 MHz, respectively, is also higher than that of 606 kHz, 20.4 dB/Hz and 2.4 MHz for the TPS laser. After further analyses, we find that the laser crystal with high doping concentration and long optical length is employed for DPS laser in order to improve the pump laser absorption efficiency, which can simultaneously increase the dipole coupling between the active atoms and the laser cavity, and then results in a high RRO frequency with a large amplitude peak as well as a high SNL cutoff frequency of the laser. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：5866 / 5874

页数：9

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