JPS60332A - Measuring device of optical power - Google Patents

Abstract

PURPOSE:To prevent the surface of a photoelectric converter or an optical fiber from the generation of dew condensation and to measure the optical power precisely by setting up a heater in a case storing the photoelectric converter. CONSTITUTION:The heater 7 is set in the case storing the photoelectric converter 2. The heater 7 is kept at a temperature higher than the periphery by receiving energy supply for a heat source from the external through an air pipe or the like. Therefore, the inside of the case 6 is heated and moisture is removed, so that the dew condensation is prevented. When dew condensation is generated on the end surface of the optical fiber 5, the end surface of the optical fiber 5 is heated by heat from the heater 7 and the moisture of dew condensation is evaporated.

Description

[Detailed Description of the Invention] This invention converts optical power into electrical quantity using a photoelectric converter,
FIG. 1 is an explanatory diagram showing an example of a conventional optical power measuring device. In the figure, (1) is an optical power meter; +21 is a photoelectric converter, (3) is a storage box that houses all optical communication devices, (41 is an optical communication device, and (5) is an optical fiber.

To measure the original power sent to the source fiber (5) connected to the source communication device (41) stored in the storage box (3), remove the optical fiber (5) from the storage box (31). Then, the optical fiber (5) must be optically coupled to the full photoelectric converter (2).When the optical fiber (5) is optically coupled to the photoelectric converter (2), the original fiber (51
The BuC power inside is converted to electrical quantity, and the original power meter (
1) The value of optical power is displayed.

Take out the original fiber +51'r from the storage box (3),
When optically coupling the optical fiber (5) to the full photoelectric converter (2), if the humidity is high or there is a difference between the temperature inside the storage box +31 and the temperature of the photoelectric converter (2) itself or its surroundings. , photoelectric converter (21 or optical fiber (5)
Condensation occurs on the surface of the
There was a possibility that the optical power within the original fiber (5) could not be accurately measured.

This invention was made to eliminate all the drawbacks of the conventional ones as described above.The photoelectric converter is housed in a case, a heater is provided inside the case, and the inside of the case is heated to evaporate the moisture inside the case. to completely prevent condensation from forming on the surface of the photoelectric converter (2) or optical fiber (5),
It is an object of the present invention to provide a power measuring device that can quickly evaporate and remove moisture if condensation occurs.

FIG. 2 is an explanatory diagram showing an embodiment of the present invention. In the figure, +11, +21, +51 indicate all parts that are the same as or correspond to the same reference numerals in FIG. 1, and (61 is a photoelectric converter (2) The case (7) is a heater installed inside the case (6).

The heater (7) provided in the case (6) that houses the photoelectric converter (21) receives energy (electricity or hot air) as a heat source from the outside through electric wires or air pipes,
The temperature is kept higher than the ambient temperature. Therefore, the inside of the case (6) is heated, moisture is removed, and dew condensation does not occur. The end face of the original fiber (5) is heated by the heat from the heating device (7), and the water condensation evaporates, and the original power inside the optical fiber (5) is reduced without adversely affecting the optical coupling. Accurately measured.

FIG. 3 is an explanatory diagram showing another embodiment of the present invention.
, air pipe, (9) is hot air. An example is shown in which a heater using hot air is used.

In the above embodiment, a case has been described in which the optical power of light sent through an optical fiber is measured, but similar effects can be obtained when light is supplied to a photoelectric converter by other means.

As explained above, this invention is configured to be able to heat the photoelectric converter that converts optical power into electrical quantity, so when optically coupling the original fiber etc. to supply the light to be measured, there is no condensation. This has the advantage that even if dew condensation occurs on the optical fiber, it evaporates quickly and does not adversely affect optical coupling.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an example of a conventional power measuring device,
FIG. 2 is an explanatory diagram showing one embodiment of the invention, and FIG. 3 is an explanatory diagram showing all other embodiments of the invention. In the figure, (1) is an optical power meter, (2) is a photoelectric converter, (5) is an optical fiber, (6) is a case, (7) is a heater, (81 is an air pipe, and (9) is hot air. The same reference numerals in each figure indicate the corresponding parts. Agent Masuo Oiwa Figure 1 Figure 2

Claims (1)

[Claims] In a power measurement device that converts optical power into an electrical quantity using a photoelectric converter and measures optical power based on this electrical quantity, a heat source is supplied from the outside to heat the vicinity of the light receiving part of the photoelectric converter. A former power measuring device characterized by a complete heater.