JPH0429384Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a power meter that uses an optical fiber connector and measures the optical power incident through the connector.

[Summary of the idea]

This invention is an optical power meter that is divided into two parts: a receiver and emitter unit with a built-in optical fiber connector, and a main body, and an easily removable connector for electronic equipment is used to connect the two, allowing for optical power measurement that is compatible with a wide variety of optical fiber connectors. This can be achieved easily and quickly by simply replacing the light receiving and emitting units.

[Conventional technology]

In order to measure the power input from an optical fiber connector, a conventional optical power meter uses a connector conversion adapter to support measurement of a wide variety of optical fiber connectors. In addition, when the wavelength of the input light is different, it is necessary to replace the light-receiving element. [Problem that the invention aims to solve] When trying to measure optical power using a combination of multiple elements, there is a drawback that preparations for measurement are complicated.

[Means for solving problems]

The purpose of the present invention is to eliminate the above-mentioned drawbacks by dividing an optical power meter into two parts, and creating various types of light-receiving unit parts that incorporate an optical fiber connector, a light-emitting element, a light-receiving element, a current-voltage converter, and a gain switching part. To provide an optical power meter that can be prepared in accordance with an optical fiber connector and quickly realizes measurement by simply replacing the receiving/emitting unit part.

〔Example〕

The present invention will be explained in detail below with reference to the drawings.

The drawings are diagrams illustrating the principle of an embodiment of the present invention.
In this figure, the current output from the light emitting element drive power source 3 passes through electronic device connector connection terminals 4a and 4b and is input to the temperature correction circuit 5. The temperature correction circuit 5 corrects fluctuations in light emission output due to temperature fluctuations of the light emitting element 6. The light output from the light emitting element 6 passes through optical fiber connectors 7a and 7b,
The signal is transmitted to the system under test 9 through the optical fiber 8 . The light that has passed through the system to be measured 9 passes through the optical fiber 10,
The light passes through optical fiber connectors 11a and 11b and is input to light receiving element 12. The input light to be measured is converted into a current by the light receiving element 12. This current, which is proportional to the power of the input light, flows through the offset adjustment circuit 1.
3, the dark current of the light receiving element 12 and the offset current of the I/V converter 14 are adjusted. The offset-adjusted current is converted into a voltage by the I/V conversion section 14 and then enters the gain switching section 15. A gain switching signal outputted from the microprocessor 18 is transmitted to the gain switching unit 15 through electronic device connector connection terminals 16c and 16d, and the voltage amplification factor is switched. The voltage amplified by the gain switching section 15 passes through the electronic device connector connection terminals 16a and 16b, is converted into a digital quantity by the A/D conversion section 17, and enters the microprocessor 18.

The microprocessor 18 performs arithmetic processing such as logarithmic conversion on the input digital quantity. The processed digital amount is sent to the display control section 19 and displayed on the display section 20 as a numerical value proportional to this digital amount. In the figure, the main body 1 and the light emitting/receiving unit 2 are connected by an electronic equipment connector 21 called a printed circuit board connector in this embodiment, so the light receiving/emitting unit 2 can be easily converted.

[Effect of idea]

According to the present invention, an optical power meter can be easily and quickly adapted to optical fiber connectors of different shapes by simply converting the receiver/emitting unit by creating a receiver/emitting unit compatible with optical fiber connectors of different shapes. is offered.

[Brief explanation of the drawing]

The drawing is an overall configuration diagram showing an embodiment of an optical power meter embodying the present invention. 1... Main body part, 2... Receiving/emitting unit part, 3...
...Light emitting element driving power supply, 4a, 4b...Connector connection terminal for electronic equipment, 5...Temperature correction circuit, 6...
Light emitting element, 7a, 7b...optical fiber connector,
8... Optical fiber, 9... System to be measured, 10... Optical fiber, 11a, 11b... Optical fiber connector, 12... Light emitting element, 13... Offset adjustment circuit, 14... I/V converter, 15... Gain switching section, 16a, 16b, 16c, 16d... Connector connection terminal for electronic equipment, 17... A/D conversion section, 18... Microprocessor, 19... Display control section, 20... Display Section 21...Connector for electronic equipment.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An optical fiber connector, a light-receiving element that photoelectrically converts light input from the optical fiber connector, and a current-voltage converter that converts the current photoelectrically converted by the light-receiving element into voltage; A gain switching section that switches the voltage amplification factor, an A/D conversion section that A/D converts the amplified voltage, an arithmetic processing section that processes the A/D converted digital quantity, and displays the measurement results. In an optical power meter, the optical power meter is composed of a display section, a section containing an optical fiber connector, a light receiving element, a current-voltage conversion section, and a gain switching section;
An optical power meter characterized in that it is divided into two parts each containing an A/D conversion part, an arithmetic processing part, and a display part, and the parts are connected by an electronic device connector. (2) The optical power meter according to claim 1, wherein the optical power meter is provided with a light emitting means for outputting light through an optical fiber connector.