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Questions and Answers
What were the first semiconductor lasers made of?
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 (correct)
- Two layers of silicon, one doped with a material for n-type and the other with a material for p-type
- Two layers of aluminum oxide, one doped with a material for n-type and the other with a material for p-type
- Two layers of germanium, 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?
Why were these devices called homostructure or homojunction lasers?
- Because their two layers were made from the same compound semiconductor (correct)
- Because they were primarily used in home entertainment systems
- Because they were initially developed in a home laboratory
- Because they emitted light in a homogeneous manner
What was the primary drawback of the homojunction diodes?
What was the primary drawback of the homojunction diodes?
- Inability to operate at high temperatures
- Inability to confine the locations of either current carriers or light very well (correct)
- Excessive power consumption
- Inability to emit light in the visible spectrum
Why did the first semiconductor lasers require cooling even to produce pulses of light?
Why did the first semiconductor lasers require cooling even to produce pulses of light?
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