Home
|
About CPB
|
Announcement
|
CPS journals
Article lookup
导航切换
Chinese Physics B
Highlights
Special topics
In press
Authors
Submit an article
Manuscript tracking
Call for papers
Scope
Instruction for authors
Copyright agreement
Templates
PACS
Flow chart
Author FAQs
Referees
Review policy
Referee login
Referee FAQs
Editor in chief login
Editor login
Office login
Content of INSTRUMENTATION & MEASUREMENT in our journal
Published in last 1 year
|
In last 2 years
|
In last 3 years
|
All
Please wait a minute...
For selected:
Download citations
EndNote
Ris
BibTeX
Toggle thumbnails
Select
A 658-W VCSEL-pumped rod laser module with 52.6% optical efficiency
Xue-Peng Li(李雪鹏), Jing Yang(杨晶), Meng-Shuo Zhang(张梦硕), Tian-Li Yang(杨天利), Xiao-Jun Wang(王小军), and Qin-Jun Peng(彭钦军)
Chin. Phys. B, 2022, 31 (
8
): 084207. DOI:
10.1088/1674-1056/ac728f
Abstract
(
392
)
HTML
(
0
)
PDF
(1488KB)(
258
)
Knowledge map
A high-efficiency and high-power vertical-cavity surface-emitting laser (VCSEL) side-pumped rod Nd:YAG laser with temperature adaptability are demonstrated. The VCSEL side-pumped laser module is designed and optimized. Five VCSEL arrays are symmetrically located around the laser rod and a large size diffused reflection chamber is designed to ensure a uniform pump distribution. Furthermore, the absorbed pump power distribution of the rod is simulated to verify the uniformity of the pump absorption. Finally, a proof-of-principle experiment is performed in short linear cavity laser with single laser module. A continuous-wave output power of 658 W at 1064 nm is obtained, the corresponding optical-to-optical efficiency is 52.6%, and the power variations are ±0.7% over 400 s and ±3.1% over the temperature range from 16 ℃ to 26 ℃. To the best of our knowledge, this is the highest output power and the highest optical-to-optical efficiency ever reported for VCSEL pumped solid-state lasers. By inserting a telescopic module into the cavity and optimizing the TEM
00
mode volume, the average beam quality is measured to be
M
2
=1.34 under an output power of 102 W. The experimental results reveal that such a high power rod laser module with temperature stability is appropriate or field applications.
Select
Design and high-power test of 800-kW UHF klystron for CEPC
Ou-Zheng Xiao(肖欧正), Shigeki Fukuda, Zu-Sheng Zhou(周祖圣), Un-Nisa Zaib, Sheng-Chang Wang(王盛昌), Zhi-Jun Lu(陆志军), Guo-Xi Pei(裴国玺), Munawar Iqbal, and Dong Dong(董东)
Chin. Phys. B, 2022, 31 (
8
): 088401. DOI:
10.1088/1674-1056/ac6b26
Abstract
(
338
)
HTML
(
0
)
PDF
(1232KB)(
280
)
Knowledge map
To reduce the energy demand and operation cost for circular electron positron collider (CEPC), the high efficiency klystrons are being developed at Institute of High Energy Physics, Chinese Academy of Sciences. A 800-kW continuous wave (CW) klystron operating at frequency of 650-MHz has been designed. The results of beam-wave interaction simulation with several different codes are presented. The efficiency is optimized to be 65% with a second harmonic cavity in three-dimensional (3D) particle-in-cell code CST. The effect of cavity frequency error and mismatch load on efficiency of klystron have been investigated. The design and cold test of reentrant cavities are described, which meet the requirements of RF section design. So far, the manufacturing and high-power test of the first klystron prototype have been completed. When the gun operated at DC voltage of 80 kV and current of 15.4 A, the klystron peak power reached 804 kW with output efficiency of about 65.3% at 40% duty cycle. The 1-dB bandwidth is ±0.8 MHZ. Due to the crack of ceramic window, the CW power achieved about 700 kW. The high-power test results are in good agreement with 3D simulation.
ISSN 1674-1056 CN 11-5639/O4
Table of contents
Cover illustration
×
Cover illustration
Download cover
Download table of contents
Current issue
, Vol. 33, No. 4
Previous issues
1992 - present
Featured Columns
Highlights
Awards
SCI top cited
Top downloaded
E-mail alert
RSS