The optical source used for detection of optical signal is

Related MCQs

• ________ couplers combine the different wavelength optical signal onto the fiber or separate the different wavelength optical signal output from the fiber.
• In optical fiber communication, the electrical signal dropping to half its constant value due to modulated portion of optical signal corresponds to _______
• A planar LED is fabricated from GaAs is having a optical power emitted is 0.018% of optical power generated internally which is 0.018% of optical power generated internally which is 0.6 P. Determine external power efficiency.
•  For many applications which involve optical fiber transmission, an intensity modulation optical source is not required. State whether the given statement is true or false.
• A combination of a FBG and optical isolators can be used to produce non-blocking optical wavelength division add/draw multiplexers. State whether the given statement is true or false.
• 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 semiconductor laser crystal of length 5 cm, refractive index 1.8 is used as an optical source. Determine the frequency separation of the modes.
• . A decibel may be defined as the ratio of input and output optical power for a particular optical wavelength. State whether the following statement is true or false.
• A single-mode optical fiber has an attenuation of 0.3dB/km when operating at wavelength of 1.1μm. The fiber core diameter is 4μmand bandwidth is 500 MHz. Find threshold optical power for stimulated Brillouin scattering.
• Which feature of an optical isolator makes it attractive to use with optical amplifier?