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首页1064nm与532nm双波长连续单频激光器研究
1064nm与532nm双波长连续单频激光器研究
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更新于2024-08-27
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本文报道了一种新型的连续波单频率激光器,其特点在于能够同时输出1064纳米和532纳米两种波长。这种激光器的设计旨在实现高效、稳定的双波长输出,对于科研和工业应用具有重要意义。研究团队由中国山西大学量子光学与量子光学设备国家重点实验室的陈伟、胡东海、祁伟和景苏等人主导。 研究人员重点探讨了激光输出功率与输出耦合器的透射率以及LiB3O5(LBO)晶体的相位匹配温度之间的关系。通过选择透射率为19%的输出耦合器,他们能够有效地控制激光的输出特性。LBO晶体被调整到最优化的相位匹配温度422K,这是确保两个不同波长能以最小的损耗进行能量转换的关键条件。 实验结果显示,当激光器运行在最佳条件下,可以达到1064纳米输出功率高达33.7瓦,532纳米输出功率为1.13瓦,且光光转换效率高达45.6%,这意味着输入光能中有相当一部分被转化为所需波长的激光能量。这种激光器表现出稳定的单频率工作模式,避免了模式跃迁问题,而且在1分钟内测量到的频率漂移小于15兆赫兹,保证了高精度和稳定性。 此外,文章还提供了激光器的M2光束质量参数,即M2x和M2y值,这对于评估激光束的质量和方向性非常重要。M2x和M2y数值越小,表示光束发散越均匀,聚焦性能越好。然而,具体的M2值并未在提供的部分内容中给出,这可能是在文章的后续部分或详尽的技术细节中讨论的内容。 这项研究展示了在单个激光器内实现双波长输出的先进技术,不仅提高了激光器的多功能性,还有助于推动光纤通信、材料处理、精密测量等领域的发展,是当前光子学研究领域的关键突破。
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Continuous-wave single-frequency laser with dual
wavelength at 1064 and 532 nm
Chenwei Zhang, Huadong Lu,* Qiwei Yin, and Jing Su
State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics,
Shanxi University, Taiyuan, Shanxi 030006, China
*Corresponding author: luhuadong@sxu.edu.cn
Received 7 August 2014; accepted 21 August 2014;
posted 25 August 2014 (Doc. ID 220401); published 22 September 2014
A continuous-wave high-power single-frequency laser with dual-wavelength output at 1064 and 532 nm
is presented. The dependencies of the output power on the transmission of the output coupler and the
phase-matching temperature of the LiB
3
O
5
(LBO) crystal are studied. An output coupler with transmis-
sion of 19% is used, and the temperature of LBO is controlled to the optimal phase-matching temperature
of 422 K; measured maximal output powers of 33.7 W at 1064 nm and of 1.13 W at 532 nm are obtained
with optical–optical conversion efficiency of 45.6%. The laser can be single-frequency operated stably and
mode-hop-free, and the measured frequency drift is less than 15 MHz in 1 min. The measured M
2
x
and M
2
y
for the 1064 nm laser are 1.06 and 1.09, respectively. The measured M
2
x
and M
2
y
for the 532 nm laser are
1.12 and 1.11, respectively. © 2014 Optical Society of America
OCIS codes: (140.3460) Lasers; (140.3515) Lasers, frequency doubled; (140.3560) Lasers, ring;
(140.3570) Lasers, single-mode.
http://dx.doi.org/10.1364/AO.53.006371
1. Introduction
Laser-diode (LD) pumped all-solid-state continuous-
wave (CW) lasers with single-frequency operation
have been extensively utilized in a variety of scien-
tific research and technology applications owing to
their advantages, such as good beam quality, high
stability, and low intensity noise. In the past 20
years, extensive efforts have been made for produc-
ing high-power single-frequency Nd:YVO
4
lasers
with wavelength of 1064 or 532 nm. A mode-hop-free
single-longitudinal-mode (SLM) 1064 nm Nd:YVO
4
laser with output power of 25 W, linewidth of less
than 2.5 MHz, and optical–optical conversion effi-
ciency of 35% was designed and built by Coherent
Inc. [
1]. Innolight GmbH also supplies a commercial
product of a SLM 1064 nm laser with a maximal out-
put power of 55 W, frequency bandwidth of ∼1 kHz,
and M
2
value of ∼1.3, respectively [2]. Recently, we
theoretically and experimentally investigated the
physical conditions of single-frequency operation
for high-power all-solid-state lasers [
3]. By inserting
a nonlinear crystal into the resonator, a stable single-
frequency 1064 nm laser with output power of 33.7 W
was obtained. Regarding single-frequency 532 nm
lasers, Coherent Inc. supplies commercial single-
frequency 532 nm lasers, whose highest output
power is 18 W corresponding to an optical–optical
conversion efficiency of 25% [
4]. In 2012, our group
implemented a single-frequency 532 nm laser with
output power up to 25 W by combining the two meth-
ods of direct pumping [
5] and self-compensation of
astigmatism [6]. So far, less attention has been
payed to research on high-power lasers with dual-
wavelength output at 1064 and 532 nm, to the best
of our knowledge. However, this kind of laser is im-
portant for many research and application fields. For
example, in quantum optics experiments, it can be
used to generate multipartite entangled states,
where the single-frequency 532 nm laser is used as
the pump and the single-frequ ency 1064 nm laser
1559-128X/14/286371-04$15.00/0
© 2014 Optical Society of America
1 October 2014 / Vol. 53, No. 28 / APPLIED OPTICS 6371
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