An injection laser has active cavity losses of 25 cm-1 and the reflectivity of each laser facet is 30%. Determine the laser gain coefficient for the cavity it has a length of 500μm.

Related MCQs

• A GaAs injection laser with an optical cavity has refractive index of 3.6. Calculate the reflectivity for normal incidence of the plane wave on the GaAs-air interface.
• A GaAs injection laser has a threshold current density of 2.5*103Acm-2 and length and width of the cavity is 240μm and 110μm respectively. Find the threshold current for the device.
• A semiconductor laser crystal of length 5 cm, refractive index 1.8 is used as an optical source. Determine the frequency separation of the modes.
• The optical source used in a fiber is an injection laser with a relative spectral width σλ/λ of 0.0011 at a wavelength of 0.70μm. Estimate the RMS spectral width.
• Propagation losses in slab and strip waveguides are smaller than the single mode fibre losses.
• 2 dB along with a splice loss of 0.1 dB at the interconnection of each stage. Determine the excess loss.
• At low gain, the transit time and RC effects
•                        waveguides are plagued by high losses.
• Absorption losses due to atomic defects mainly include                        
• Optical fibers suffer radiation losses at bends or curves on their paths.