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Red Laser Diode

Photonics Spectra
Sep 2010
Mitsubishi Electric Europe BV, Semiconductor European Business GroupRequest Info
 
Mitsubishi Electric Europe BV has introduced a 638-nm red laser diode. The ML520G72 offers high output power and is suited to picoprojector applications or other portable display systems requiring a red light source with high brightness. Its 500-mW output power achieves a luminous flux of up to 60 lm as opposed to the 10 lm offered by LED-based projectors, according to the company. Conversion efficiency from electrical to optical power is 32% at 500 mW and at a case temperature of 25 °C. This helps to reduce power consumption and therefore to extend the battery lifetime. Over the temperature range of –5 to 40 °C, the laser diode can produce up to 500 mW of continuous-wave power, and it can provide pulsed laser light of 600 mW at 50 °C when operating with a maximum duty cycle of 25% at frequencies of at least 50 Hz.


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GLOSSARY
conversion efficiency
In a pumped laser system, the ratio of output energy to pump energy.
luminous flux
Descriptive of the radiant power of visible light modified by the eye response. It is the measure of the flow of visible light energy past any given point in space in a given time period, and is defined as the amount of flux radiated by a source of 1 candela into a solid angle of 1 steradian.
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