Laser output power stabilization for circular laser writing systems by using acousto-optic modulator

2007 ◽  
Author(s):  
Dong-Ik Kim ◽  
Hyug-Gyo Rhee ◽  
Jae-Bong Song ◽  
Yun-Woo Lee
Keyword(s):  
Output Power ◽  
Laser Output ◽  
Laser Output Power ◽  
Writing Systems ◽  
Laser Writing ◽  
Acousto Optic Modulator ◽  
Power Stabilization

Variation of laser output power with coupling ratio and magnification

2013 ◽  
Vol 25 (4) ◽  
pp. 832-840
Author(s):  
刘万发 Liu Wanfa ◽  
桑凤亭 Sang Fengting
Keyword(s):  
Output Power ◽  
Laser Output ◽  
Laser Output Power ◽  
Coupling Ratio

Influence of biosafety materials of the laser output power

2020 ◽  
Author(s):  
Fernanda Cristina Nogueira Rodrigues ◽  
Júlia Gomes Lúcio de Araújo ◽  
Erika Michele dos Santos Araújo ◽  
Andréa Dias Neves Lago ◽  
Taís Fonseca Mantilla ◽  
...  
Keyword(s):  
Output Power ◽  
Laser Output ◽  
Laser Output Power

Performance Study of a GaAs Based Laser Diode Chip in a Condensing Environment

2009 ◽  
Author(s):  
Sushma Madduri ◽  
Bahgat G. Sammakia ◽  
William Infantolino ◽  
Satish C. Chaparala ◽  
Lawrence C. Hughes ◽  
...  
Keyword(s):  
Output Power ◽  
Laser Diode ◽  
Laser Diodes ◽  
Accelerated Aging ◽  
Climatic Conditions ◽  
Laser Output ◽  
Laser Output Power ◽  
Stress Tests ◽  
Performance Study ◽  
Aerospace Material

This paper presents a performance study done on semiconductor laser diodes in a moisture condensing environment. Devices with laser diodes are used in a wide variety of electronic applications and in various climatic conditions. The motivation behind this study is a common environmental exposure, where a device using a laser diode is brought into a relatively humid environment (a building) from a cold, outside environment. Under such conditions, condensation occurs on various components of the device, including the diode, and could affect the laser output power. Reliability of the device is a critical concern since the laser diode and the lens are susceptible to failure due to such repetitive condensation conditions. The test vehicle chosen for this study was a 980nm laser diode. These are used in products for a broad range of markets, including data communications, aerospace, material processing, scientific and defense industries [1–3]. These products may be used in environmental conditions that could result in condensation within the product. A hermetic package could address this concern, but it is an expensive option. Nonhermetic packaging for the laser component could help lower the cost of these devices; however reliability is a potential concern. Prior research on laser diodes consists of various reliability measurements on 980nm lasers using stress tests (e.g. accelerated aging tests; thermal cycling tests) [3–6]. Reliability analysis of laser diodes specifically addressing condensation measurements has not been previously reported. A Military Standard Specification [MIL-STD-883E Method 1004.7] titled, ‘Moisture resistance test’ was used to conduct this reliability study [10]. An experimental setup was designed and fabricated. A photonic package with a 980nm laser diode was subjected to repetitive condensing cycles and laser output power was recorded as a function of time, temperature and humidity. The variation in laser output power due to condensation was observed and quantified. The focus of this paper is on performance degradation of the laser diode. The possible mechanisms for this degradation are currently being investigated.

scholarly journals A Comparative Study of Thermal Impact on Erbium Doped Distributed Feedback Fiber Laser Output Power

2020 ◽  
Vol 12 (2) ◽  
pp. 1-9 ◽  
Author(s):  
Jian Guo ◽  
Haifeng Qi ◽  
Zhiqiang Song ◽  
Jiasheng Ni ◽  
Chang Wang ◽  
...  
Keyword(s):  
Comparative Study ◽  
Fiber Laser ◽  
Output Power ◽  
Distributed Feedback ◽  
Laser Output ◽  
Laser Output Power ◽  
Thermal Impact ◽  
Erbium Doped

A Design of Diode Laser Output Power Autocontrol System

Applied laser ◽  
2012 ◽  
Vol 32 (5) ◽  
pp. 424-428
Author(s):  
李铁军 Li Tiejun ◽  
宓现强 Mi Xianqiang
Keyword(s):  
Diode Laser ◽  
Output Power ◽  
Laser Output ◽  
Laser Output Power

Highly-stable 20/400 Yb-doped Large-mode-area Fiber with 3kW Laser Output Power

2017 ◽  
Author(s):  
Yuying Wang ◽  
Kun Peng ◽  
Huan Zhan ◽  
Shuang Liu ◽  
Yuwei Li ◽  
...  
Keyword(s):  
Output Power ◽  
Laser Output ◽  
Laser Output Power ◽  
Large Mode Area ◽  
Mode Area
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