Injection laser have a high threshold current density of

Related MCQs

• A GaAs injection laser has a threshold current density of 2.5*103Acm-2and length and width of the cavity is 240μmand 110μm respectively. Find the threshold current for the device.
• Determine the threshold current density for an AlGaAs injection laser with T0=180k at 30°C.
• An injection laser has active cavity losses of 25 cm-1and the reflectivity of each laser facet is 30%. Determine the laser gain coefficient for the cavity it has a length of 500μm.
• The parameters having a major role in determining threshold current of efficiency of injection laser are:
• The thulium doped fiber laser when pumped with alexandrite laser output at 0.786 μm, the laser emits at
• The behavior of laser occurring when current is increased above threshold particularly is
• In Fabry-perot laser, the lower threshold is obtained by
• In Fabry-perot laser, the lower threshold is obtained by
• 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.
• 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.