4 Questions
What were the first semiconductor lasers made of?
Two layers of gallium arsenide, one doped with a material for n-type and the other with a material for p-type
Why were these devices called homostructure or homojunction lasers?
Because their two layers were made from the same compound semiconductor
What was the primary drawback of the homojunction diodes?
Inability to confine the locations of either current carriers or light very well
Why did the first semiconductor lasers require cooling even to produce pulses of light?
They were not able to confine the locations of either current carriers or light very well
Test your knowledge about the structure of the first semiconductor lasers, which consisted of two layers made from the same compound, generally gallium arsenide. Learn about the construction and operation of homojunction lasers and their key components.
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