Optical Power Meter OPM-300

Optical Power Meter: OPM

OPM300 Handheld Optical Power Meter

OPM300 Handheld Optical Power Meter

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FOT Optical Power Meter Series

  FOT OPM300 Handheld Optical Power Meter is a fiber optic tester, which aims at the installation, engineering acceptance and maintenance of fiber network. Compared with other usual power meters, it has more functions, like automatic wavelength identification, auto wavelength switching, intelligent backlight, data saving via USB port.


  • Wave ID Auto wavelength identification & switching 
  • Frequency ID —Auto frequency identification
  • 2 types of backlight modes, manual or outside light intensity, which indicated by LED light red or blue color.
  • Intelligent backlight 
  • USB communication port for saved testing records download
  • Reference power level can be set up and stored
  • User self-calibrating function
  • Auto-off function 
  • Up to 240hrs battery life


Calibration Wavelength(nm)800~1700
Detector typeInGaAs
Detector Size(mm)0.3
Measurement Range(dBm)-60-24
Uncertainty (dB)+ 0.2(5%)
linearity (dB)0.01
Display resolution(dB)0.03
Frequency ID (Hz)270 330 1K 2K
Wave ID (nm)8.509801300131E+25
Resolution(dB)Linear 0.1% or Non-linear 0.01dBm
Communication PortUSB
ConnectorFC/PC ( Interchangeable FC/SC/ST connectors can be optional)
Alkaline battery3AAA 1.5V  or Li battery (9V) optional
Power Adapter(V)8.4
Battery Operating time (h)240 without backlight
Operation Temperature( o C)-10( o C) +60
Storage Temperature( o C)-25( o C)+70
PackageOptical Power Meter, 3pcs 1.5V Batteries, Power Adapter(optional), User Manual, USB cable, CD, Cotton Stick and Soft Carrying Case.

Optical Power Meter knowledge

An optical power meter (OPM) is a device used to measure the power in an optical signal. The term usually refers to a device for testing average power in fiber optic systems. Other general purpose light power measuring devices are usually called radiometers, photometers, laser power meters, light meters or lux meters.

Three types of equipment can be used to measure optical power loss:

  • Component equipment – Optical Power Meters (OPMs) and Stabilized Light Sources (SLSs) are packaged separately, but when used together they can provide a measurement of end-to-end optical attenuation over an optical path. Such component equipment can also be used for other measurements.
  • Integrated test set – When an SLS and OPM are packaged in one unit, it is called an integrated test set. Traditionally, an integrated test set is usually called an OLTS. Generic Requirements for Hand-Held Stabilized Light Sources, Optical Power Meters, Reflectance Meters, and Optical Loss Test Sets, discusses OLTS equipment in depth.
  • An Optical Time Domain Reflectometer (OTDR) can be used to measure optical link loss if its markers are set at the terminus points for which the fiber loss is desired. The accuracy of such a measurement can be increased if the measurement is made as a bidirectional average of the fiber. Generic Requirements for Optical Time Domain Reflectometer (OTDR) Type Equipment, discusses OTDR equipment in depth.
optical power meter (OPM) in use

optical power meter (OPM) in use

Background Knowledge:

  1. A typical optical power meter consists of a calibrated sensor, measuring amplifier and display. The sensor primarily consists of a photodiode selected for the appropriate range of wavelengths and power levels. On the display unit, the measured optical power and set wavelength is displayed. Power meters are calibrated using a traceable calibration standard such as a NIST standard.
  2. A traditional optical power meter responds to a broad spectrum of light, however the calibration is wavelength dependent. This is not normally an issue, since the test wavelength is usually known, however it has a couple of drawbacks. Firstly, the user must set the meter to the correct test wavelength, and secondly if there are other spurious wavelengths present, then wrong readings will result.
  3. Sometimes optical power meters are combined with a different test function such as an Optical Light Source (OLS) or Visual Fault Locator (VFL), or may be a sub-system in a much larger instrument. When combined with a light source, the instrument is usually called an Optical Loss Test Set.
  4. Optical Loss Test Sets (OLTS) are available in dedicated hand held instruments and platform-based modules to suit various network architectures and test requirements. They are used to measure optical power and power loss, and reflectance and reflected power loss. The products may also be used as optical sources or optical power meters, or to measure optical return loss or event reflectance. (Knowledge is from Wiki)
FOT Optical Power Meter

FOT Optical Power Meter


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