Table of Contents
What is variable optical attenuator?
A variable optical attenuator is used to trim a fiber’s optical signal power levels. Applications include leveling the power exiting an optical amplifier across a fiber’s spectrum, and protecting a photodetector at a receiver from being overwhelmed by too strong a signal (Fig. 4.3).
What is precision attenuator?
A precision type variable attenuator consists of a rectangular to circular transition (ReT), a piece of circular waveguide (CW) and a circular-to-rectangular transition (CRT) as shown in figure 5.9. Resistive cards R , Rand R are placed inside these sections as shown.
What is a digital attenuator?
A digital attenuator is a device that attenuates or reduces the amplitude of an RF signal passing through it – where the amount of attenuation is digitally controlled.
What are types of attenuation losses in optical fiber?
The losses in optical fiber are Absorption loss, scattering loss, dispersion loss, radiation loss and coupling loss.
What is digital attenuator?
Digital attenuators employ semiconductor devices to achieve each attenuation step. Some of the semiconductor devices employed for this purpose include: PIN diodes, MOSFETs, and GaAs MESFET. Digital attenuators are capable of achieving switching rates that are comparable to the speeds of solid-state switches.
How does a digital attenuator work?
Unlike continuously variable attenuators, digital attenuators switch-in discrete, finite attenuation states, usually in binary steps. Using semiconductor devices such as GaAs MESFETs, PIN diodes or MOSFETs to achieve different attenuation states, switching can be performed at speeds comparable to solid-state switches.
What is a voltage variable attenuator?
A voltage variable attenuator is an electronic device that provides a variable attenuation depending on the voltage applied. Unlike fixed attenuators whose attenuation cannot be adjusted by a user, the attenuation levels of variable attenuators can be changed to desired values.
What wavelength bands do your attenuators operate over?
All of our attenuators operate over the two standard wavelength bands, the C-Band and the L-Band. This wide wavelength range makes these components ideal for DWDM applications.
What makes our attenuators ideal for DWDM applications?
This wide wavelength range makes these components ideal for DWDM applications. Our attenuators are wavelength insensitive, which means they operate with minimal changes in attenuation when used in either the C-Band or the L-Band and exhibit low return loss.
Are your attenuators wavelength insensitive or wavelength sensitive?
Our attenuators are wavelength insensitive, which means they operate with minimal changes in attenuation when used in either the C-Band or the L-Band and exhibit low return loss. In addition, all of our attenuators have a wide attenuation range, which means they operate at a wide range of power levels.