Device which apply the frequency-selective feedback technique to provide single longitudinal operation are referred to as ________________

Related MCQs

• Single longitudinal mode operation is obtained by
•  __________________ may be improved through the use of frequency-selective feedback so that the cavity loss is different for various longitudinal modes.
• Which of the following does not provide single frequency operation?
• Longitudinal modes contribute only a single spot of light to the laser output. State whether the given statement is true or false.
• The first order grating (l=1) provide the strongest coupling within the device. State whether the given statement is true or false.
• When a constant d.c. drive current is applied to device, the optical o/p power is 320 μm. Determine optical o/p power when device is modulated at frequency 30 MHz with minority carrier recombination lifetime of LED i.e. 5ns.
• The spectral width of emission from the single mode device is
• An optical fiber has core-index of 1.480 and a cladding index of 1.478. What should be the core size for single mode operation at 1310nm?
• A step-index fiber has core refractive index 1.46 and radius 4.5μm. Find the cutoff wavelength to exhibit single mode operation. Use relative index difference as 0.25%.
• A step-index fiber has core refractive index 1.46 and radius 4.5μm. Find the cutoff wavelength to exhibit single mode operation. Use relative index difference as 0.25%.