Buried hetero-junction (BH) device is a type of _____________ laser where the active volume is buried in a material of wider band-gap and lower refractive index.
A)gas lasers.
B)gain guided lasers.
C)weak index guiding lasers.
D)strong index guiding lasers.

Question

Quizplus · Accepted Answer

Buried hetero-junction (BH) devices are a type of strong index guiding lasers. In these devices, the active region is embedded within a material that has a wider band-gap and a lower refractive index, which helps in confining both the optical mode and the carriers tightly to the active region, leading to efficient lasing action.

Buried Hetero-Junction (BH) Device Is a Type of _____________ Laser