CN213714547U - Chip spectral characteristic test system based on single mode fiber - Google Patents

Abstract

The utility model discloses a chip spectral characteristic test system based on single mode fiber. The test system comprises a spectrometer, a single-mode fiber and a collimation coupling assembly; the collimation coupling assembly comprises a sleeve, a ceramic ferrule and a lens; the lens and the ceramic ferrule are coaxially arranged in the sleeve, and the ceramic ferrule is positioned behind the focus of emergent light of the lens; the lens is opposite to the light outlet of the chip to be detected; and one end of the single-mode fiber is connected with the ceramic ferrule, and the other end of the single-mode fiber is connected with the spectrometer. The test system increases the longitudinal safe distance of coupling (namely the distance between the collimation coupling assembly and the tested chip), avoids the damage to the chip in the coupling process, further increases the coupling tolerance and improves the coupling speed.

Description

Chip spectral characteristic test system based on single mode fiber

Technical Field

The utility model belongs to the technical field of the spectral test, concretely relates to chip spectral characteristic test system based on single mode fiber.

Background

With the rapid development of data communication, the demand of modern communication systems for communication capacity is increasing. Optical wavelength division multiplexing is used more and more widely as a main multiplexing method for increasing communication capacity. Whether coarse wavelength division multiplexing CWDM or dense wavelength division multiplexing DWDM is adopted, LWDM and MWDM appear later, which put higher and higher requirements on the wavelength range of the laser, that is, the requirements on the spectrum screening of the laser chip are higher and higher.

On the other hand, in the optical communication industry, an optical chip must be subjected to an aging process, and power and spectral characteristic tests are required before and after aging in order to ensure that an aging-failed chip or semi-finished product can be effectively screened out.

At present, the spectrometer for testing must be the energy input of the optical fiber interface, which requires that the laser Chip or Chip assembly CoC is coupled once to couple the energy into a section of optical fiber, and then the energy can enter the spectrometer for spectrum measurement. In the currently known method for coupling CoC to optical fiber, the CoC and multimode optical fiber are directly coupled in a counter-coupling mode, so that the coupling loss is large, the energy entering a spectrometer is insufficient, and the spectrum SMSR measurement is inaccurate; although the mode of directly adopting fiber lens (fiber lens) and CoC alignment can improve the energy entering the optical fiber, because the area of the optical spot that the fiber lens (fiber lens) can receive is small, the coupling distance between the CoC and the fiber lens needs to be very close when alignment is carried out, and the position of the fiber lens also needs to be repeatedly adjusted, thus easily causing damage to the chip.

SUMMERY OF THE UTILITY MODEL

Adopt multimode fiber and CoC to the mode coupling loss of coupling great in order to solve current mode, can lead to getting into the energy of spectrometer not enough, spectrum SMSR surveys inaccurately to and adopt fiber lens (fiber lens) and CoC to aim at, the coupling distance needs very closely, easily causes the problem of chip damage, the utility model provides a chip spectral characteristic test system based on single mode fiber.

The utility model discloses a concrete technical scheme is:

the utility model provides a chip spectral characteristic test system based on single mode fiber, which comprises a spectrometer, a single mode fiber and a collimation coupling component;

the collimation coupling assembly comprises a sleeve, a ceramic ferrule and a lens;

the lens and the ceramic ferrule are coaxially arranged in the sleeve, and the ceramic ferrule is positioned behind the focus of emergent light of the lens;

the lens is opposite to the light outlet of the chip to be detected;

and one end of the single-mode fiber is connected with the ceramic ferrule, and the other end of the single-mode fiber is connected with the spectrometer.

Further, the sleeve is a ceramic sleeve or a metal sleeve.

Further, the lens is an aspherical lens.

Compared with the prior art, the utility model beneficial effect be:

1. the utility model discloses a spectrum test system that collimation coupling subassembly, spectrum appearance, single mode fiber found compares with the couple with CoC and fiber lens (fiber lens), has increased the vertical safe distance of coupling (being collimation coupling subassembly and being surveyed the distance between the chip promptly), has avoided the damage of coupling process to the chip, and the coupling tolerance is further increased simultaneously, has improved coupling speed.

2. The utility model discloses a spectrum test system that collimation coupling subassembly, spectrum appearance, single mode fiber found compares with CoC and the direct couplet of multimode fiber, has improved coupling efficiency, can satisfy spectrum SMSR to the requirement of center wavelength energy.

Drawings

FIG. 1 is a schematic diagram of a test system.

The reference numbers are as follows:

the device comprises a 1-spectrometer, a 2-single mode fiber, a 3-collimation coupling component, a 31-sleeve, a 32-lens, a 33-ceramic ferrule, a 4-chip to be tested and a 5-power supply.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.

As shown in fig. 1, the present invention provides a specific example of a single mode fiber based chip spectral characteristic testing system, which includes a spectrometer 1, a single mode fiber 2 and a collimating coupling component 3; the collimating coupling assembly 3 comprises a sleeve 31, a lens 32 and a ceramic ferrule 33; the lens 32 and the ferrule 33 are coaxially arranged in the sleeve 31, and the ferrule 33 is positioned behind the light-emitting focus of the lens 32; the lens 32 is opposite to the light outlet of the tested chip 4; one end of the single-mode fiber 2 is connected with the ceramic ferrule 33, and the other end of the single-mode fiber is connected with the spectrometer 1; the chip under test is an LD chip (laser chip) in this example, which is connected to a power supply 5 by means of a power-on probe.

It should be noted that: the lens in this embodiment is an aspherical lens, but is not limited to this. The sleeve is a ceramic sleeve, but not limited to a ceramic sleeve, and in fact a metal sleeve may be used, and the selection of the above components may be determined according to the actual situation.

When the optical fiber testing device works, the tested chip emits light after being electrified, and the lens converges emergent light of the tested chip and sends the converged emergent light to the spectrometer through the ceramic ferrule and the single-mode optical fiber to perform testing work.

Claims (3)

1. A chip spectral characteristic test system based on single mode fiber is characterized in that: the device comprises a spectrometer, a single mode fiber and a collimation coupling component;

the collimation coupling assembly comprises a sleeve, a ceramic ferrule and a lens;

the lens and the ceramic ferrule are coaxially arranged in the sleeve, and the ceramic ferrule is positioned behind the focus of emergent light of the lens;

the lens is opposite to the light outlet of the chip to be detected;

and one end of the single-mode fiber is connected with the ceramic ferrule, and the other end of the single-mode fiber is connected with the spectrometer.

2. The single mode fiber based chip spectral characteristic testing system of claim 1, wherein: the sleeve is a ceramic sleeve or a metal sleeve.

3. The single mode fiber based chip spectral characteristic testing system of claim 1, wherein: the lens is an aspheric lens.

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