In Buried hetero-junction (BH) lasers, the optical field is confined within

Related MCQs

• 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.
• Compute power internally generated within a double-heterojunction LED if it has internal quantum efficiency of 64.5 % and drive current of 40 mA with a peak emission wavelength of 0.82 μm.
• A planar LED is fabricated from GaAs is having a optical power emitted is 0.018% of optical power generated internally which is 0.018% of optical power generated internally which is 0.6 P. Determine external power efficiency.
• Determine the total carrier recombination lifetime of a double heterojunction LED where the radioactive and nonradioactive recombination lifetime of minority carriers in active region are 70 ns and 100 ns respectively.
•  ____________________ lasers are presently the major laser source for optical fiber communications
• Intensity of output from semiconductor injection lasers leading to optical intensity noise is due to
• In multimode lasers the optical feedback from unnecessary external reflections affecting stability of frequency and intensity is
• ____________________ lasers are presently the major laser source for optical fiber communications
• . A decibel may be defined as the ratio of input and output optical power for a particular optical wavelength. State whether the following statement is true or false.
• A single-mode optical fiber has an attenuation of 0.3dB/km when operating at wavelength of 1.1μm. The fiber core diameter is 4μmand bandwidth is 500 MHz. Find threshold optical power for stimulated Brillouin scattering.