How do variable optical attenuators work to reduce power?
Variable optical attenuator is an important optical passive device in fiber optic communication, which enables real-time control of the signal by attenuating the transmitted optical power. Simply put, in optical modules, the use of optical attenuators can reduce the bit error rate (BER). To achieve BER, optical power needs to be reduced, which requires the use of optical attenuators.
The optical signal strength received by the optical receiving equipment needs to be within a certain range, and the optical power should not be too strong or too weak, otherwise it will cause the equipment life to become shorter or not work properly. Fiber optic attenuator is what can be used to reduce the energy of the optical signal, the input optical power attenuation of optical passive devices to avoid distortion of the optical receiver due to the input optical power is too strong.
Fiber optic attenuator is to reduce the optical power by absorption, reflection, diffusion, scattering, deflection, diffraction, dispersion, etc. of the optical signal. For example, the absorption of the optical signal, the optical fiber attenuator set a working wavelength range that can absorb light energy, in this range, its not reflect light, reduce unnecessary echo reflection, through this way to achieve the effect of attenuation of optical power. Generally use air isolation technology, displacement misalignment technology, attenuating fiber technology, absorption glass method and other technologies to produce optical attenuators.
The attenuation range of optical attenuators is from 0 to 65 dB. Among them, the fixed fiber attenuators currently on the market attenuate power between 1 and 30 dB. Fixed fiber optic attenuator is a category of fiber optic attenuator, is the attenuation power fixed at an attenuation value. It is generally used in telecom networks, fiber optic test equipment, local area networks (LAN) and cable television (CATV) systems.
Variable optical attenuator can be used with optical wavelength division multiplexer (WDM), splitting detector (TAPPD), erbium-doped fiber amplifier (EDFA) and other optical devices to form ROADM, VMUX, gain flat EDFA and other modules, but also directly used for overload protection of optical receivers. In addition, the optical power meter and other instrumentation measurement, calibration, also need to use to VOA
With the increasing application of VOA in optical communication, the requirements for its function are also increasing: VOA should be able to accurately control the power of optical signal and provide stable attenuation amount for each channel wavelength; in the ultra-long distance DWDM system, VOA shall have sufficient sensitivity and reliability to compensate for the changes of signal optical power caused by external factors such as environment.
Related models.
Keysight N7751A single-channel optical attenuator
Keysight N7752A 2-channel optical attenuator
Agilent 81560A Variable optical attenuator
Keysight N7761A Single-Channel Variable Optical Attenuator
Keysight N7762A 2-channel variable optical attenuator
Keysight N7764A 4-channel variable optical attenuator
Keysight N7766A 2-channel multimode optical attenuator
Keysight N7768A 4-channel multimode optical attenuator
Optical Attenuators: Agilent 8156A,Agilent 8157A,Agilent 81570A,Agilent 81571A,Agilent 81576A, Agilent 81577A,Agilent 81567A
Variable optical attenuator is an important optical passive device in fiber optic communication, which enables real-time control of the signal by attenuating the transmitted optical power. Simply put, in optical modules, the use of optical attenuators can reduce the bit error rate (BER). To achieve BER, optical power needs to be reduced, which requires the use of optical attenuators.
The optical signal strength received by the optical receiving equipment needs to be within a certain range, and the optical power should not be too strong or too weak, otherwise it will cause the equipment life to become shorter or not work properly. Fiber optic attenuator is what can be used to reduce the energy of the optical signal, the input optical power attenuation of optical passive devices to avoid distortion of the optical receiver due to the input optical power is too strong.
Fiber optic attenuator is to reduce the optical power by absorption, reflection, diffusion, scattering, deflection, diffraction, dispersion, etc. of the optical signal. For example, the absorption of the optical signal, the optical fiber attenuator set a working wavelength range that can absorb light energy, in this range, its not reflect light, reduce unnecessary echo reflection, through this way to achieve the effect of attenuation of optical power. Generally use air isolation technology, displacement misalignment technology, attenuating fiber technology, absorption glass method and other technologies to produce optical attenuators.
The attenuation range of optical attenuators is from 0 to 65 dB. Among them, the fixed fiber attenuators currently on the market attenuate power between 1 and 30 dB. Fixed fiber optic attenuator is a category of fiber optic attenuator, is the attenuation power fixed at an attenuation value. It is generally used in telecom networks, fiber optic test equipment, local area networks (LAN) and cable television (CATV) systems.
Variable optical attenuator can be used with optical wavelength division multiplexer (WDM), splitting detector (TAPPD), erbium-doped fiber amplifier (EDFA) and other optical devices to form ROADM, VMUX, gain flat EDFA and other modules, but also directly used for overload protection of optical receivers. In addition, the optical power meter and other instrumentation measurement, calibration, also need to use to VOA
With the increasing application of VOA in optical communication, the requirements for its function are also increasing: VOA should be able to accurately control the power of optical signal and provide stable attenuation amount for each channel wavelength; in the ultra-long distance DWDM system, VOA shall have sufficient sensitivity and reliability to compensate for the changes of signal optical power caused by external factors such as environment.
Related models.
Keysight N7751A single-channel optical attenuator
Keysight N7752A 2-channel optical attenuator
Agilent 81560A Variable optical attenuator
Keysight N7761A Single-Channel Variable Optical Attenuator
Keysight N7762A 2-channel variable optical attenuator
Keysight N7764A 4-channel variable optical attenuator
Keysight N7766A 2-channel multimode optical attenuator
Keysight N7768A 4-channel multimode optical attenuator
Optical Attenuators: Agilent 8156A,Agilent 8157A,Agilent 81570A,Agilent 81571A,Agilent 81576A, Agilent 81577A,Agilent 81567A