Which of the following devices are less widely used in the field of optical fibre communications?

Related MCQs

• 2 BASIC OPTICAL LAWS AND DEFINITIONS, OPTICAL MODES AND CONFIGURATIONS
•                        measurements give an indication of the distortion to the optical signals as they propagate down optical fibers.
•                  couplers combine the different wavelength optical signal onto the fiber or separate the different wavelength optical signal output from the fiber.
• Plastic fibers are less widely used than glass fibers.
•                                    is used when the optical emission results from the application of electric field.
• A permanent joint formed between two different optical fibers in the field is known as a                          
• Propagation losses in slab and strip waveguides are smaller than the single mode fibre losses.
• 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.
•                            may be used for measurement of the absolute optical attenuation on a fiber link.