Generalized formula for continuous-wave end-pumped Yb-doped material amplifier gain and laser output power in various pumping configurations

2006 ◽  
Vol 45 (36) ◽  
pp. 9203 ◽  
Author(s):  
Gilbert L. Bourdet ◽  
Eric Bartnicki
Keyword(s):  
Output Power ◽  
Continuous Wave ◽  
Laser Output ◽  
Laser Output Power ◽  
Amplifier Gain

scholarly journals POWER SCALING IN CONTINUOUS-WAVE YB:YAG MICROCHIP LASER FOR MEASURING APPLICATIONS

2017 ◽  
Vol 8 (3) ◽  
pp. 222-227
Author(s):  
A. M. Ivashko ◽  
V. E. Kisel ◽  
N. V. Kuleshov
Keyword(s):  
Laser Beam ◽  
Output Power ◽  
Continuous Wave ◽  
Beam Quality ◽  
Microchip Laser ◽  
Laser Output ◽  
Laser Beams ◽  
Laser Output Power ◽  
Simultaneous Generation ◽  
Diode Pumped

Characteristics optimization of lasers used in different measuring systems is of great interest up to now. Diode-pumped microchip lasers is one of the most perspective ways for development of solid-state light sources with minimal size and weight together with low energy power consumption. Increasing of output power with good beam quality is rather difficult task for such type of lasers due to thermal effects in the gain crystal under high pump power.The investigation results of continuous-wave longitudinally diode-pumped Yb:YAG microchip laser are presented. In the presented laser radiation from multiple pump laser diodes were focused into the separate zone in one gain crystal that provides simultaneous generation of multiple laser beams. The energy and spatial laser beam characteristics were investigated.Influence of neighboring pumped regions on energy and spatial laser beams parameters both for separate and for sum laser output was observed. The dependences of laser output power from distance between neighboring pumped regions and their number were determined. Decreasing of laser output power was demonstrated with corresponding distance shortening between pumped regions and increasing their quantity with simultaneous improvement of laser beam quality.Demonstrated mutual influence of neighboring pumped regions in the longitudinally diode pumped Yb:YAG microchip laser allow as to generate diffraction limited Gaussian beam with 2W of continuous-wave output power that 30 % higher than in case of one pumped zone. 

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

The effect of low-level laser irradiation on dog spermatozoa motility is dependent on laser output power

2008 ◽  
Vol 24 (5) ◽  
pp. 703-713 ◽  
Author(s):  
M. I. Corral-Baqués ◽  
M. M. Rivera ◽  
T. Rigau ◽  
J. E. Rodríguez-Gil ◽  
J. Rigau
Keyword(s):  
Laser Irradiation ◽  
Output Power ◽  
Laser Output ◽  
Laser Output Power ◽  
Spermatozoa Motility ◽  
Low Level ◽  
Low Level Laser ◽  
Level Laser ◽  
Low Level Laser Irradiation
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