Longitudinal modes contribute only a single spot of light to the laser output.

Related MCQs

• 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.
• 43 μm. Determine the number of longitudinal modes.
• 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.
• How many propagation modes are present in single mode fibers?
• Single mode fibers allow single mode propagation; the cladding diameter must be at least                        
• 2 BASIC OPTICAL LAWS AND DEFINITIONS, OPTICAL MODES AND CONFIGURATIONS
• The difference between the modes’ refractive indices is called as                        
• How many networking modes are available to establish a transmission path?
• 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 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.