How many sections are included in a sampling grating distributed Bragg-reflector laser (SG-DBR)?

Related MCQs

• The InGaAsP/InP double channel planar DFB-BH laser with a quarter wavelength shifted first order grating provides a single frequency operation and incorporates a phase shift of ______________
• 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 thulium doped fiber laser when pumped with alexandrite laser output at 0.786 μm, the laser emits at
• An FBG is developed within a fiber core having a refractive index of 1.30. Find the grating period for it to reflect an optical signal with a wavelength of 1.33μm.
• The first order grating (l=1) provide the strongest coupling within the device. State whether the given statement is true or false.
• The Nd: YAG laser is costlier than earth-doped glass fiber laser. State whether the following statement is true or false
• _________________ laser can be produced when a coupler section is introduced between the amplifier and phase sections of a structure
• The beat length in a single mode optical fiber is 8 cm, when light from a laser with a peak wavelength 0.6μm is launched into it. Estimate the modal birefringence.
• 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.
• _________ semiconductor laser sources generally have broader bandwidths.