How to use an optical power meter? How to look at the optical power counting value

Delete Data Key: Deletes the measurement data.

Key: Unit conversion of the measurement result. Each time the key is pressed, the display mode will switch between "W" and "DBM".

3.LD key: When used as a light source mode, convert 1310mm and 1550mm wavelengths, commonly used 1310mm.

4.+ Button: Toggle 6 reference calibration points with 6 basic wavelength calibration points: 850nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm.

5.Save - key: Save the measurement data.

Key: Optical Power Meter and Light Source Mode Conversion.

Tips and tricks:1The IN port of the optical power meter represents the input port and is used for the acceptance mode of the optical power meter.

2.The out port of the optical power meter represents the output port and is used for the light source mode of the optical power meter.

Extended information: For users of specific applications, the following points should be paid attention to when choosing the right optical power meter:

1.Select the best probe type and interface type.

2.Evaluate calibration accuracy and manufacturing calibration procedures to meet your fiber and splicing requirements.

3.Make sure these models are consistent with their own measurement range and display resolution.

4.It has a DB function that directly measures insertion loss.

An optical power meter is an instrument used to measure absolute optical power or the relative loss of optical power through a length of fiber. In fiber optic systems, measuring optical power is the most basic, much like a multimeter in electronics; In fiber optic measurement, optical power meter is a common meter for heavy loads. By measuring the absolute power of the transmitter or optical network, an optical power meter can evaluate the performance of the optical transceiver.

When used in combination with a stabilized light source, an optical power meter can measure connection loss, verify continuity, and help assess fiber link transmission quality.

Instructions for use: The two optical fibers are plugged into the two ends of the optical cable splice closure after removing the red hat, as shown in the figure below, and then the other two ends of the optical fiber are plugged into the two ends of the light source and the optical power meter respectively (be careful not to insert too tightly to avoid damage to the optical fiber plug), turn on the power switch of the light source and the optical power meter respectively, the wavelength of the optical power meter and the light source is set to 1310nm, and the frequency of the light source is set to 0hz. Measurements:

Observe the absolute value of the attenuation value of the optical power meter, if it is a long distance, the absolute value of the attenuation value is less than 12dBm, which is the normal value; For short distances, the absolute value of the attenuation value is less than 10 dBm, which is normal.

First of all, several conditions need to be met: there is a luminous light source (the light source of the equipment or the optical path of the light source transmitted); Test the optical fiber (there should be a connector connecting the light source and the optical power meter, if the connector does not match, the corresponding converter is required); light attenuation (if the optical power is very high); Optical power meter (to be electrified).

In the case of uncertainty about the optical power (very high), the optical attenuation is first connected to the light source or optical power meter, and one end can be used. Then the light source and the optical power meter are connected with optical fibers, open the optical power meter, press the symbol to adjust the corresponding wavelength, the displayed value plus the value of the light attenuation is the optical power, if the measured optical power is not very high, it is recommended to take off the light attenuation and test again.

When measuring the absolute optical power, as long as the light source is connected, the value in dBm in the second row of the screen is the optical power value.

Turn on network optics and simply use an optical power meter and a fiber connector adapter to measure the power of the transmitter or receiver. Before measuring the power, the wavelength and other parameters of the optical power meter must be set within the specified range, and finally write down the measured value, compare it with the power value specified by the equipment to see whether it is within the specified floating range, pay attention to the interface of the optical power meter and the interface of the network optical device, and equip the appropriate optical fiber test jumper according to these conditions to measure the optical fiber attenuationIf you know the luminous value of the light-emitting device, you can directly connect the measured optical fiber, and subtract the luminous value of the light-emitting device after obtaining the value, and then obtain the attenuation value of the optical fiber.

Numerical Method:

Test fiber TX and tenant RX must be tested separately, in the case of a single fiber, only need to test once, because only one fiber is used, the principle of a single fiber is wavelength division multiplexing, but the possibility of using a fiber coupler is higher, there are two ways to connect the fiber, one is a fixed connection, one is an active connection, the fixed connection is a fusion connection, the two sections of fiber are connected by special discharge equipment, the advantage is low loss, the disadvantage is that the operation is complex, and the flexibility is poor. <>

To put it simply, the optical power is connected to the optical fiber with a light source, the corresponding wavelength is selected, and the displayed value dbm is the power value to be tested. TFN optical power is currently a good reputation on the market, with simple operation, high test accuracy, direct matching with the operator's value, and is also widely used in security monitoring

The interaction between the charges takes place through an electric field. As long as there is an electric charge, there is an electric field around the charge, and the basic property of the electric field is that it has a strong effect on the charge placed in it, and this force is called the electric field force.

Electrostatic force: Electrostatic force, the force of interaction between charged bodies at rest. A charged body can be seen as being made up of many point charges, and the interaction force between each pair of stationary point charges follows Coulomb's law. Also known as Coulomb force.

Difference: Electrostatic force is similar to gravity is a conservative force, and the work done by electrostatic force has nothing to do with the path of motion of the charge, but is determined by the difference between the electric potential of the initial and final positions of the charge in the electric field and the electric charge of the charge, that is, wab q(ua ub) quab From the above equation, it can be seen that the potential difference (voltage) is a physical quantity that reflects the ability of the electric field force to do work The relationship between the work done by the electrostatic field force and the electric potential energy is similar to the relationship between the work done by gravity and the gravitational potential energy, that is, the work done by the electrostatic field force is equal to the decrease in the electric potential energy (wab a b δ

The basic characteristic of an electric field is that it can be subjected to a force on the charge in it, and the electric field strength e at a point in the electric field is defined as the ratio of the stationary test charge placed at that point to its electric charge q, i.e., e f q. (Note: The field strength has nothing to do with the amount of charge of the test charge and whether or not to put the test charge in it!)

The electric field strength at a point in the electric field is numerically equal to the electric field force experienced by the unit charge at that point. The electric charge and volume of the test charge should be small enough to ignore its influence on the electric field distribution and accurately describe the electric field at each point. The field strength is a vector quantity whose direction is positive and the direction of the force on the test charge is equal to the force experienced by the unit test charge.

The unit of field strength is volt-meter, 1 volt meter and 1 bullhouse.

SJ130 light source, SJ160 visual light source, SJ180 optical power meter.

The laser light source is connected to an optical attenuator, and by adjusting the optical attenuator to output different power values, the light source output passes through the optical attenuator and enters a fiber optic beam splitter. Through the splitting principle of the optical beam splitter, the same light is transmitted to the standard optical power meter and the optical power meter at the same time, so that only the optical attenuator needs to be adjusted, and the values of the standard optical power meter and the optical power meter can be read at the same time.

The power value of the optical fiber splitter on the two splitters is measured by the same standard power meter before measurement, and the power difference between the two optical paths is accurately measured, and this difference should be corrected and compensated as an important correction component in the measurement. It should be noted that the power beam splitting ratio at different wavelengths is different and needs to be corrected separately, and the fiber head should be kept clean during the measurement.

The use of the optical power meter should be used with the light source, if you want to know how many db of light emitted by the light source, use the A end of a pigtail to link the light source B end to connect the optical power meter, and the value displayed in the optical power meter is how many db of light emitted by the light source, and the light emitted by the general light source is about 7 dB.

It is worth noting that the light source and the optical power meter should choose the same wavelength for testing, for example, if the light source is 1310nm, the optical power meter should choose the same.

However, if the optical cable fails, because the equipment is still emitting light, generally do not use the OTDR test, you need to pay attention to the same light emitted by the equipment and the OTDR, which may destroy the equipment or the OTDR, and use the optical power meter to test, and the OTDR generally tests the spare fiber core, because it mainly depends on the quality of the fiber core in use, you need to connect a pigtail to the optical power meter and the fiber core in use to see if it can receive light and how many db of light it receives.

Generally, the base station is less than 36db or smaller, and the maximum value is reached, and if it is a general repeater, it will be about 10db.

If it is monitoring, optical fiber Internet access, etc., which generally require data, it should be smaller, because of the fear of losing data.

There is a tutorial on komshine.com.,You can search for it.

Summary. Traditional calibration method: The traditional calibration method of optical power meter is to pass through an attenuation regulator through a laser light source, and connect with the standard optical power meter and the measured optical power meter successively through the plugging and unplugging of optical fiber connectors.

Traditional calibration methods introduce mating and unplugging errors and light source stability errors.

Traditional calibration method: The traditional calibration method of optical power meter is to pass through an attenuation regulator through a laser light source, and connect with the standard optical power meter and the measured optical power meter through the plugging and unplugging of the optical fiber connector to measure the measurement. Traditional calibration methods introduce insertion and unplugging errors and light source stability errors.

Why is it displayed normally when using the light decay?

How to regulate. New calibration method: the laser light source is connected to the optical attenuator, and the output of the light source is not adjusted by adjusting the optical attenuator to output different power values, and the light source output enters a fiber optic nanobeam splitter after passing through the optical attenuator.

Through the splitting principle of the optical beam splitter, the same light is transmitted to the standard optical power meter and the detected optical power meter at the same time, so that only the optical attenuator needs to be adjusted, and the imitation Zen can read the values at different power points of the standard optical power meter and the detected optical power meter at the same time.