Introduction to the working principle of the classification and manufacture of optical fiber attenuators

Optical attenuator is a very important passive component of fiber optics that appears with the development of the optical communication industry. Optical fiber attenuator is an optical device that can reduce the energy of optical signals. It is used to attenuate the input optical power and avoid the distortion of the optical receiver due to the super strong input power.

Optical fiber attenuators are mainly used in: optical fiber communication network, optical data network, optical fiber CATV network.

Optical fiber attenuator test system features: high attenuation precision, low additional loss, and good stability.

How Fiber Attenuators Work

The working principle of fiber attenuator production:

(1) Air isolation technology: The transmission of light in the optical fiber is restricted by the law of total reflection and cannot be scattered out, keeping the intensity relatively stable. Once it is detached from the fiber, adding an air space between the fiber and the fiber will scatter the light, causing the attenuation of the light.

(2) Displacement and dislocation technology: This method is to perform micro-translation and dislocation of the cores of two optical fibers, so as to achieve the effect of power loss.

(3) Attenuating fiber technology: According to the absorption effect of metal ions on light, an attenuating fiber doped with metal ions is developed, and the attenuation fiber is inserted into the ceramic ferrule. (4) Absorption glass method: The optically polished neutral absorption glass sheet can also be used in the production of optical attenuators.

Classification of fiber attenuators:

(1) Adjustable optical fiber attenuator: Adjustable optical attenuator (VOA) has a wide range of applications in optical communication, and its main function is to reduce or control the optical signal. We have introduced a new type of laser energy attenuator with continuously adjustable and large attenuation coefficient. The device not only has simple structure, few components and small size, but also is convenient to manufacture, low cost, and easy to integrate with other devices.

(2) Fixed optical attenuator: Fixed optical attenuator is used for the principle that the optical fiber system may use multiple functions.

(3)Male-Female Fiber Attenuator: This is a male-female device for different connector designs (LC/SC/FC/ST/MU), PC, UPC or APC grinding (APC optional tapered or Step-shaped ferrule), attenuation value: 1~30dB, wavelength: single mode 1310um, 1550um; or dual wavelength; multimode 850um or dual wavelength, with dust cap, male and female fiber attenuator Features: metal ion attenuation fiber reaches Attenuation effect, high power resistance, light weight, small size, high precision, good stability, various forms, easy to use; the last point is the application range of optical fiber attenuators: optical distribution frame, optical fiber network system, high-speed optical fiber transmission system, cable television (CATV) system, long-distance trunk dense wavelength division multiplexing (DWDM) system, optical add-drop multiplexer (OADM).