TOSA bandwidth rapid measurement device and method based on vector network analyzer

Abstract

The invention discloses a TOSA bandwidth rapid measurement device and method based on a vector network analyzer, and the device is characterized in that an output port Port1 of the vector network analyzer is connected with a programmable attenuator, and the programmable attenuator is connected with a single-pole multi-throw radio frequency switch through a bias device; the single-pole multi-throw radio frequency switch is used for being connected with one end of the standard TOSA, and the other end of the standard TOSA is connected with the optical beam splitter through the optical switch; the single-pole multi-throw radio frequency switch is also used for being connected with one end of the tested TOSA, and the other end of the tested TOSA is connected with the optical beam splitter through the optical switch; the optical beam splitter is connected with the photoelectric conversion module and the optical power meter. The photoelectric conversion module is connected with an input port Port2 of the vector network analyzer; the single-pole multi-throw radio frequency switch and the optical switch are both connected with the control unit, and the control unit is connected with the vector network analyzer. The TOSA test efficiency is improved, and the test requirements of batch TOSA bandwidth parameters of a production line are met.

Description

technical field [0001] The invention relates to the technical field of optoelectronic testing, in particular to a TOSA bandwidth fast measurement device and method based on a vector network analyzer. Background technique [0002] The statements in this section merely provide background related to the present disclosure and do not necessarily constitute prior art. [0003] TOSA (is the abbreviation of Transmitter Optical Subassembly, light emitting component) is used to output high-frequency modulated optical signal, and is the core device in high-speed optical transmission system. As the core technical index of TOSA, 3dB bandwidth requires strict testing in product development and production. In engineering, a separate instrument is often used to build a test system or a lightwave component analyzer is used to test TOSA. The use of a separate instrument to build a test system has the disadvantages of complex methods and difficult calibration; the solution using lightwave co...

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Problems solved by technology

[0005] Commonly used discrete instruments to build test systems, systems such as Figure 1, discrete instruments such as microwave scanning signal generator, DC regulated power supply, high-speed photodetector, microwave power meter, spectrum analyzer and PC are used The TOSA test system built, although the system can realize the frequency response test of TOSA, but there are problems such as complex system construction, difficult calibration, complex test operation, low test efficiency, etc.

[0006] Using the light wave component analyzer for measurement, only one TOSA can be tested at a time, and the light receiving dynamic range of the light wave component analyzer is too small, such as the measured When the average output optical power of the component is low, the lightwave component analyzer cannot test it. In addition, this solution also has the disadvantage of low test efficiency. When testing multiple components, it is necessary to repeatedly plug and unplug the connection, and the measurement repeatability is poor.

[0007] These methods have the disadvantages of complex test methods, difficult calibration, small dynamic range, low test efficiency, and poor measurement repeatability, and cannot meet the high precision of the mass TOSA frequency response of the production line Quick measurement needs

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