Output Power Characteristics of the Laser Diode-end-pumped cw Nd:GdVO$_4$ Laser Operating at 1.34

2012 ◽  
Vol 62 (2) ◽  
pp. 148-154
Author(s):  
Han-Tae CHOO* ◽  
Cha-Gon PARK ◽  
Gyu-Ug KIM ◽  
Sung-Wug BYEN
Keyword(s):  
Output Power ◽  
Laser Diode ◽  
Power Characteristics

Output Power Characteristics of the Laser-diode-pumped Quasi-three-level 914 nm-Nd:YVO$_{4}$ Laser

2015 ◽  
Vol 65 (2) ◽  
pp. 188-193
Author(s):  
Han Tae CHOO* ◽  
Gyu Ug KIM ◽  
Cha Gon PARK ◽  
Kun Hee RHYEE
Keyword(s):  
Output Power ◽  
Laser Diode ◽  
Power Characteristics ◽  
Diode Pumped

The Analysis of Output Power of a Laser Diode Based on the Difference Method

2011 ◽  
Vol 474-476 ◽  
pp. 1678-1683 ◽  
Author(s):  
Bu Yin Garidi ◽  
Jiu Ru Yang ◽  
Hong An Ye
Keyword(s):  
Output Power ◽  
Analytical Model ◽  
Laser Diode ◽  
Difference Method ◽  
Internal Quantum Efficiency ◽  
Threshold Current ◽  
Rate Equations ◽  
Average Error ◽  
Mean Deviation ◽  
Power Characteristics

It is an expedient and efficient method to simulate the output power characteristics of a laser diode through the numerical analysis. In this paper, firstly, based on the rate equations of the electrons transition in the active layer, the functions of some key parameters, such as internal quantum efficiency, threshold current and leakage current, etc., are defined with the variance of working temperature. And an accurate numerical analytical model is built by adopting the low-complexity difference method. Then, the simulated results are compared with the results from testing and Optiwave3.0 software. The results show that, by using the proposed analytical model, the simulation on the output power characteristics of a laser diode can be realized in all input current fields, which overcomes the drawbacks within the Optiwave3.0 software. At the same time, the mean deviation between the simulated results and testing results is reduced obviously, and the average error is only 3.88%.

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.

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