What you need to know about optical power meters?
Introduction, application, normal value!
Optical
power meter refers to an instrument used to measure absolute optical power or
the relative loss of optical power through a section of optical fiber. In the
optical fiber system, measuring the optical power is the most basic, much like
a multimeter in electronics; in the optical fiber measurement, the optical
power meter is a heavy-duty common meter. By measuring the absolute power of
the transmitter or optical network, an optical power meter can evaluate the
performance of the optical device. Using an optical power meter in combination
with a stable light source can measure connection loss, check continuity, and
help evaluate the transmission quality of optical fiber links.
How many dbm of the optical power meter is
normal
The
normal value of the optical power meter is 12dbm.
Application of optical power meter
With
the rapid development of optical fiber communication technology, optical fiber
communication has become the main transmission mode of various communication
networks. Optical power is the most basic measurement parameter in optical
fiber communication systems, and one of the most important parameters for
evaluating the performance of optical end equipment and evaluating the quality
of optical fiber transmission. Optical power meter is an instrument specially
used to measure absolute optical power or relative loss of optical power
passing through a section of optical fiber. It is widely used in the laying of
communication trunk lines, equipment maintenance, scientific research and
production.
In
optical fiber measurement, the optical power meter is a commonly used meter for
heavy loads. By measuring the excellent power of the transmitter or optical
network, an optical power meter can evaluate the performance of the optical
device. Using an optical power meter in combination with a stable light source
can measure connection loss, check continuity, and help evaluate the
transmission quality of optical fiber links.
Normal range of optical power meter
The
normal value of the optical fiber tested by the optical power meter is that the
optical fiber loss per kilometer is 0.5 decibels. When the effective connection
is relatively small, the value can be reduced to 0.4 decibels. The theoretical
value of pure fiber is 0.2db/km, excluding active connection, it can be reduced
to 0.3db.
The
unit of optical power is dbm. In the specification of optical transceivers or
switches, there are light emitting and receiving light power. Usually the
optical power is less than 0dbm. The minimum optical power that the receiver
can receive is called sensitivity. The maximum optical power unit that can
receive negative sensitivity is DB (dbm-dbm=db), which is called dynamic range.
The luminous power
minus the receiving sensitivity is the allowable fiber loss value. The actual
luminous power subtracted from the actual received optical power is the fiber
loss (db). The optimal value of the optical power received by the receiver is the
maximum optical power that can be received-(dynamic range/2), but it usually
does not reach the ideal value.
Related article you may intereted in: What is an Optical Fiber Power Meter in Fiber Optic Installation and Maintenance?
