Description : Specify the mechanism that SLDs lack that is required by laser diodes to achieve lasing.
Last Answer : SLDs have no built-in optical feedback mechanism.
Description : Describe the output of a laser diode.
Last Answer : The LD's output has a narrow spectral width and small output beam angle.
Description : What is lowest current at which stimulated emission exceeds spontaneous emission in a semiconductor laser called?
Last Answer : Threshold current.
Description : Why are LEDs preferred over laser diodes for low- and moderate-frequency analog applications?
Last Answer : LEDs require less complex circuitry than lasers.
Description : Why would a laser diode be used in a low-data-rate digital application?
Last Answer : When extremely high transmitter output powers are required.
Description : Is the drive circuitry generally more complex for an LED or a laser diode? Why?
Last Answer : For a laser diode. The laser diode transmitter generally contains output power control circuitry and may contain a TE cooler and some circuitry associated with the TE cooler.