CN203116945U - Novel device for measuring optical waveguide splitting ratio - Google Patents

Abstract

The utility model discloses a novel device for measuring the optical waveguide splitting ratio, which comprises an insertion and return loss tester, wherein the insertion and return loss tester is composed of a measurement optical source and an insertion and return loss optical power meter, an output end of the measurement optical source is connected with an input end of a tested optical device, and an output end of the tested optical device is connected with an input end of the insertion and return optical power meter. The novel device for measuring the optical waveguide splitting ratio has the advantages of simple structure, convenient use and high measurement precision.

Description

A kind of novel optical waveguide splitting ratio measurement mechanism

Technical field

The utility model relates to a kind of measurement mechanism, particularly a kind of novel optical waveguide splitting ratio measurement mechanism.

Background technology

Optical waveguide has obtained using widely in integrated optics system, and has very big potentiality, receives much concern in recent years, and every index of therefore understanding it is most important; In many indexs of optical waveguide, splitting ratio is one of extremely important index; This project has highlighted measurement mechanism and the measuring method of splitting ratio.For splitting ratio, adopting wavelength respectively is the Output optical power of LASER Light Source measurement Y waveguide two tail optical fibers of 1310nm and 1550nm; After calculating splitting ratio according to formula, the principal element of analyzing influence measurement result is carried out evaluation of uncertainty in measurement; By the measurement to the Y waveguide index, help to understand better the performance of Y waveguide.

Optical waveguide is widely used in the integrated optics system as a kind of integrated optical device, and it can be divided into the two-beam ripple with a branch of light wave, also the two-beam ripple can be merged into a branch of light wave; Use the Y waveguide beam splitter can improve the transmitance of luminous energy in the integrated optical circuit, easily and the optical fiber coupling that achieves a butt joint, can also integrate with other discrete components (laser instrument, modulator, photoswitch etc.), at present at aspects such as the distribution of optical communication field, interferometry, optical sensor, energy and transmission wide application prospect be arranged; The Y waveguide device has following technical indicator usually: splitting ratio, insertion loss, tail optical fiber polarization cross-talk, half-wave voltage modulation band-width etc.Therefore, understand every index, the measurement method of parameters and important of Y waveguide.

The utility model content

The technical problems to be solved in the utility model provides a kind of simple in structure, easy to use, a kind of novel optical waveguide splitting ratio measurement mechanism that measuring accuracy is high.

For achieving the above object, the technical solution of the utility model is as follows:

A kind of novel optical waveguide splitting ratio measurement mechanism comprises

One turns back to the damage tester, described turn back to decrease tester by measurement light source and turn back to decrease light power meter and form, the output terminal of described measurement light source is connected with the input end of tested optical device, the output terminal of described tested optical device is connected with the input end that turns back to the damage light power meter.

In an embodiment of the present utility model, described measurement light source is connected with tested optical device by jumping fiber.

In an embodiment of the present utility model, described tested optical device decreases light power meter and is connected with turning back to by tail optical fiber.

In an embodiment of the present utility model, described turn back to the measurement power bracket of decreasing light power meter for+3dBm～-80dBm.

In an embodiment of the present utility model, the described measurement wavelength coverage that turns back to the damage light power meter is 850nm～1610nm.

By technique scheme, the beneficial effects of the utility model are:

The utility model is simple in structure, easy to use, measuring accuracy is high, good stability.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the utility model measuring principle Fig. 1;

Fig. 2 is the utility model measuring principle Fig. 2.

Numeral and the represented corresponding component title of letter among the figure:

100, turn back to and decrease tester 110, measurement light source 120, turn back to and decrease light power meter 200, tested optical device 300, jumping fiber 400, first tail optical fiber 500, second tail optical fiber.

Embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

Referring to illustrated in figures 1 and 2, a kind of novel optical waveguide splitting ratio measurement mechanism of the utility model comprises turning back to and decreases tester 100, turn back to decrease tester 100 by measurement light source 110 and turn back to damage light power meter 120 and form, the output terminal of measurement light source 110 is connected with the input end of tested optical device 200 by jumping fiber 300, and the output terminal of tested optical device 200 is connected with the input end that turns back to damage light power meter 120 by tail optical fiber.

The utility model turns back to and decreases tester is a desk-top, has the single light source delivery outlet, and screen directly shows backreflection, difference return loss and the direct sunshine power measuring instrument device of measurement result; It is applicable to light communication element, the measurement of the attachment plug of system, particularly Connectorized fiber optic cabling; System can built-in any two fixed wave length light source; LCD display directly shows test parameter and data; Built-in laser emitting module, power receiver module, turn back to the damage modular converter, have multiple function and measure in real time; Optical fiber interface can connect professional universal adapter FC, SC, ST, LC etc., the measurement of the multiple optical patchcord end face of applying in a flexible way.

Along with the development of optical fiber communication, the widespread production of high speed fibre transmission system and application (as SDH, high-power CATV etc.) must have very high return loss, and Distributed Feedback Laser is owing to its line width, and output characteristics is easy to be subjected to the influence of return loss; Thereby have a strong impact on the performance of system, even common laser instrument also can be subjected to the influence of return loss to some extent, therefore, the test of the loss of various optical fibre devices becomes more and more important in the system.

Turn back to and decrease the luminous power detection of light power meter employing higher sensitivity and LASER Light Source stabilization technique, power precision height, measurement power bracket+3dBm～-80dBm, the wavelength coverage 850nm of measurement～1610nm.Use very flexiblely, show luminous power, return loss and the insertion loss value etc. of employed operation wavelength, tested optical device on the instrument simultaneously.

Desirable fiber end face is a kind of calibrating device preferably, uses the good FC/APC wire jumper end face of grinding very general as calibrating device, and uncertainty is generally in 0.2dB.

The FC connector of test lead must keep clean, and will reduce the plug number of times as far as possible, in order to avoid the damage end face causes the increase of additional reflection.

The range request excessively of test is comparatively strict, the return loss value of calibrating device, test wire jumper itself and the clean-up performance of each end face all can cause significant impact to test result, the error that unclean end face causes can reach more than the 10dB, therefore, the test end face needs often cleaning, and the test wire jumper also need regularly upgrade (plug causes end wear).

Simultaneously, this tester has the function of normal optical power meter, and built-in double-wavelength light source commonly used (1310/1550nm) namely can use as the normal optical power meter, also can be used as high stability single/double-wavelength light source and uses, and is flexible and convenient to use.

The step of the measuring method of the utility model optical waveguide splitting ratio measurement mechanism is as follows:

(1) parameter of at first measuring jumping fiber reaches respective standard, will turn back to decrease light power meter and make zero; Y waveguide two tail optical fibers are made a mark, be designated as first tail optical fiber 400 and second tail optical fiber 500, therefore two tail optical fiber Output optical power are designated as P respectively ₀₁And P ₀₂

(2) decrease switch key under the luminous power by turning back to, select wavelength 1310nm, connect according to Fig. 1, measure P ₀₁Numerical value connects according to Fig. 2, measures P ₀₂Numerical value;

(3) decrease switch key under the luminous power by turning back to, select wavelength 1550nm, connect according to Fig. 1, measure P ₀₁Numerical value connects according to Fig. 2, measures P ₀₂Numerical value;

(4) basic definition of splitting ratio (D) is: each branch's Output optical power of integrated optics beam splitter is the ratio that two tail optical fiber Output optical power account for total Output optical power respectively with respect to the ratio of total Output optical power relative value for its value of Y waveguide modulator.Can obtain the computing formula of splitting ratio according to definition:

$[\frac{P_{o1}}{P_{o1}+P_{o2}}\×100]:[\frac{P_{o2}}{P_{o1}+P_{o2}}\×100]---\left(1\right)$

In the formula: D is splitting ratio; P ₀₁It is the luminous power of first tail optical fiber output; P ₀₂It is the luminous power of second tail optical fiber output; Can calculate splitting ratio D according to (1) formula.

More than show and described ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the instructions just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims (5)

1. a novel optical waveguide splitting ratio measurement mechanism is characterized in that: comprise

One turns back to the damage tester, described turn back to decrease tester by measurement light source and turn back to decrease light power meter and form, the output terminal of described measurement light source is connected with the input end of tested optical device, the output terminal of described tested optical device is connected with the input end that turns back to the damage light power meter.

2. a kind of novel optical waveguide splitting ratio measurement mechanism according to claim 1, it is characterized in that: described measurement light source is connected with tested optical device by jumping fiber.

3. a kind of novel optical waveguide splitting ratio measurement mechanism according to claim 1 is characterized in that: described tested optical device decreases light power meter and is connected with turning back to by tail optical fiber.

4. a kind of novel optical waveguide splitting ratio measurement mechanism according to claim 1 is characterized in that: described turn back to the measurement power bracket of decreasing light power meter for+3dBm～-80dBm.

5. a kind of novel optical waveguide splitting ratio measurement mechanism according to claim 1 is characterized in that: described to turn back to the measurement wavelength coverage of decreasing light power meter be 850nm～1610nm.

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