CN103743549A - Device performance measuring apparatus for semiconductor laser bar - Google Patents
Device performance measuring apparatus for semiconductor laser bar Download PDFInfo
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- CN103743549A CN103743549A CN201310669410.0A CN201310669410A CN103743549A CN 103743549 A CN103743549 A CN 103743549A CN 201310669410 A CN201310669410 A CN 201310669410A CN 103743549 A CN103743549 A CN 103743549A
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- axis collimation
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Abstract
The invention discloses a device performance measuring apparatus for a semiconductor laser bar. The measuring apparatus comprises a fast axis collimation micro lens. A beam splitting board is arranged in front of the fast axis collimation micro lens. A bar curvature and near field light intensity distribution test module and a bar space spectrum distribution test module are arranged at the two sides of the beam splitting board respectively. The bar curvature and near field light intensity distribution test module and the bar space spectrum distribution test module are connected with a computer. With the technical scheme in the invention, the device performance measuring apparatus is easy to operate and very high in test efficiency, heat dispersion performance and stress introduced in packaging of the semiconductor laser bar can be comprehensively analyzed, so that not only the device performance measuring apparatus exerts very important significance on the semiconductor laser bar performance analysis and packaging technology improvement, but also the device performance measuring apparatus has the advantages of being high in function integration level and high in testing efficiency, and the device performance measuring apparatus is suitable for large-scale production.
Description
Technical field
The invention belongs to laser testing field, be specifically related to a kind of device performance measurement mechanism of semiconductor laser bar.
Background technology
Laser technology is one of great technological invention of twentieth century.Four during the last ten years, take laser instrument as basic laser technology, obtained development rapidly, the every field such as commercial production, communication, information processing, health care, military affairs, culture and education and scientific research have now been widely used in, obtained good economic benefit and social benefit, national economy and social development will have been brought into play to more and more important effect.Semiconductor laser because volume is little, the life-span is long, photoelectric transformation efficiency is high, the advantage such as stability and good reliability, its range of application has covered whole optoelectronics field.
The semiconductor laser bar length of standard is 10mm, comprises 10-100 luminescence unit.In parallel P-N knot direction, each luminescence unit size is about 50-200 μ m; Perpendicular to P-N, tying direction, each luminescence unit size is about 1 μ m.
Semiconductor laser bar is when work, very large to heat sink temperature gradient from bar bar, because laser instrument bar bar backing material (gallium arsenide) does not mate with heat sink material (oxygen-free copper) thermal linear expansion coefficient (CTE), thereby cause the generation of thermal stress.Thermal stress causes that in bar bar, each luminescence unit is being subjected to displacement perpendicular to P-N knot direction, add perpendicular to the luminous size of the P-N knot direction 1 μ m that only has an appointment, so less displacement is to luminous generation considerable influence, not point-blank, this phenomenon is called as smile effect to make to cling in bar array each luminescence unit.Stress makes original straight bar bar that " bending " occur, affected the quality of transmitting light beam, has increased the difficulty of rear end collimation, coupling.
LIV(power-current-voltage that the performance parameter of the semiconductor laser of traditional test is mainly) and spectrum, now also there are fewer companies or R&D institution can measure near field, far-field intensity distribution both at home and abroad, bar bar flexibility (" smile " value), spatial spectral distribution, the parameters such as polarization state.Mainly there is following problem in existing semiconductor laser test macro:
1) function integration is not strong, and semiconductor laser generally once can only test out certain some performance parameter, a certain the performance parameter that a set of subsystem in testing apparatus can only testing laser device in other words;
2) testing efficiency is low, for example, in a kind of characteristic testing system of semiconductor laser that domestic patent of invention (publication number 102109571A) discloses, measurement space spectrum test is the spectrum that the mode of blocking by slit plate is measured each luminous point on bar bar, then wavelength information is illustrated in together with luminous point hot spot on same figure, realizes.This mode is measured and need to be scanned each luminous point with slit plate, complicated operation, and testing efficiency is very low.
Summary of the invention
For overcoming deficiency of the prior art, the invention provides a kind of device performance measurement mechanism of semiconductor laser bar.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention is achieved through the following technical solutions:
A kind of device performance measurement mechanism of semiconductor laser bar, comprise fast axis collimation lenticule, before described fast axis collimation lenticule, be provided with beam-splitter, the both sides of described beam-splitter are respectively arranged with bar bar flexibility and near field intensity distribution test module and bar bar spatial spectral distribution test module, and described bar bar flexibility and near field intensity distribution test module are all connected with computing machine with described bar bar spatial spectral distribution test module.
Further, described bar bar flexibility and near field intensity distribution test module comprise the first slow axis collimation lens, the first imaging len and a CCD camera, described the first slow axis collimation lens is arranged on a side of described beam-splitter, before described the first slow axis collimation lens, be provided with described the first imaging len, before described the first imaging len, be provided with a described CCD camera, a described CCD camera is connected with described computing machine.
Further, described bar bar spatial spectral distribution test module comprises the second slow axis collimation lens, described the second slow axis collimation lens is arranged on the opposite side of described beam-splitter, before described the second slow axis collimation lens, be provided with adjustable absorption attenuator, before described adjustable absorption attenuator, be provided with the first catoptron, before described the first catoptron, be provided with the second catoptron, before described the second catoptron, be provided with spectroscope, before described spectroscope, be provided with long wavelength's transmission module and short wavelength's reflecting module, described short wavelength's reflecting module comprises the first Amici prism, before described the first Amici prism, be provided with the second imaging len, before described the second imaging len, be provided with the first cone, before described the first cone, be provided with the 2nd CCD camera, described the 2nd CCD camera is connected with described computing machine, described long wavelength's transmission module comprises the 3rd catoptron, before described the 3rd catoptron, be provided with the second Amici prism, before described the second Amici prism, be provided with the 3rd imaging len, before described the 3rd imaging len, be provided with the second shading sleeve, before described the second shading sleeve, be provided with the 3rd CCD camera, described the 3rd CCD camera is connected with described computing machine.
Compared with prior art, the present invention has following beneficial effect:
Technical solution of the present invention, once test can be measured flexibility (" smile " value), near field intensity distribution and these three kinds of performance parameters of spatial spectral distribution of semiconductor laser bar, and test space spectral distribution completes by Polaroid, testing efficiency is very high; By these three test results can noise spectra of semiconductor lasers the heat dispersion of bar bar and the stress that encapsulation is introduced carry out multianalysis; Apparatus of the present invention not only have very important meaning to the semiconductor laser bar performance evaluation of bar and the improvement of encapsulation technology, and its functional integration is high and the high advantage of testing efficiency is applicable to large-scale production.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of instructions, below with preferred embodiment of the present invention and coordinate accompanying drawing to be described in detail as follows.The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the device performance measurement mechanism of semiconductor laser bar of the present invention;
Fig. 2 is the bar bar flexibility measurement result figure of the device performance measurement mechanism of semiconductor laser bar of the present invention;
Fig. 3 is the bar bar near field intensity distribution result of calculation figure of the device performance measurement mechanism of semiconductor laser bar of the present invention;
Fig. 4 is the bar bar spatial spectral distribution measurement result figure of the device performance measurement mechanism of semiconductor laser bar of the present invention.
Number in the figure explanation: 1, fast axis collimation lenticule, 2, beam-splitter, 301, the first slow axis collimation lens, 302, the second slow axis collimation lens, 401, the first imaging len, 402, the second imaging len, 403, the 3rd imaging len, 501, the one CCD camera, 502, the 2nd CCD camera, 503, the 3rd CCD camera, 6, adjustable absorption attenuator, 701, the first catoptron, 702, the second catoptron, 703, the 3rd catoptron, 8, spectroscope, 901, the first Amici prism, 902, the second Amici prism, 1001, the first shading sleeve, 1002, the second shading sleeve, 11 computing machines.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Shown in Fig. 1, a kind of device performance measurement mechanism of semiconductor laser bar, comprise fast axis collimation lenticule 1, described fast axis collimation lenticule 1 is provided with beam-splitter 2 above, the both sides of described beam-splitter 2 are respectively arranged with bar bar flexibility and near field intensity distribution test module and bar bar spatial spectral distribution test module, and described bar bar flexibility and near field intensity distribution test module are all connected with computing machine 11 with described bar bar spatial spectral distribution test module.
Further, described bar bar flexibility and near field intensity distribution test module comprise the first slow axis collimation lens 301, the first imaging len 401 and a CCD camera 501, described the first slow axis collimation lens 301 is arranged on a side of described beam-splitter 2, described the first slow axis collimation lens 301 is provided with described the first imaging len 401 above, described the first imaging len 401 is provided with a described CCD camera 501 above, and a described CCD camera 501 is connected with described computing machine 11.
Further, described bar bar spatial spectral distribution test module comprises the second slow axis collimation lens 302, described the second slow axis collimation lens 302 is arranged on the opposite side of described beam-splitter 2, described the second slow axis collimation lens 302 is provided with adjustable absorption attenuator 6 above, described adjustable absorption attenuator 6 is provided with the first catoptron 701 above, described the first catoptron 701 is provided with the second catoptron 702 above, described the second catoptron 702 is provided with spectroscope 8 above, described spectroscope 8 is provided with long wavelength's transmission module and short wavelength's reflecting module above, described short wavelength's reflecting module comprises the first Amici prism 901, described the first Amici prism 901 is provided with the second imaging len 402 above, described the second imaging len 402 is provided with the first cone 1001 above, described the first cone 1001 is provided with the 2nd CCD camera 502 above, described the 2nd CCD camera 502 is connected with described computing machine 11, described long wavelength's transmission module comprises the 3rd catoptron 703, described the 3rd catoptron 703 is provided with the second Amici prism 902 above, described the second Amici prism 902 is provided with the 3rd imaging len 403 above, described the 3rd imaging len 403 is provided with the second shading sleeve 1002 above, described the second shading sleeve 1002 is provided with the 3rd CCD camera 503 above, described the 3rd CCD camera 503 is connected with described computing machine 11.
Principle of the present invention:
First the light that light device bar bar sends be divided into two bundles by beam-splitter 2 after fast axis collimation lenticule 1 collimation, flexibility and the near field intensity distribution of reflected light test bar bar, the spatial spectral distribution of transmitted light test bar bar.
In reflected light path, the first slow axis collimation lens 301 compression light beams are in the angle of divergence of slow-axis direction, by the first imaging len 401, be imaged onto on a CCD camera 501 again and be transferred to computing machine 11, can obtain clinging to bar flexibility distribution plan, as shown in Figure 2, computing machine is processed bar bar flexibility distribution plan again, the y direction of distribution plan is carried out to intensity integration, and result is simplified to the intensity that represents a luminous point with a point, can draw the near field intensity distribution of bar bar, as shown in Figure 3.
In transmitted light path, the second slow axis collimation lens 302 compression light beams are in the angle of divergence of slow-axis direction, adjustable absorption attenuator 6 is for regulating light intensity, the first catoptron 701 and the second catoptron 702 for folded optical path to reduce proving installation volume, then wavelength selects spectroscope 8 to determine its light path trend (for example wavelength is less than the light reflection of 1000nm, and wavelength is greater than the light transmission of 1000nm) according to the wavelength length of light beam.Light path after wavelength is selected spectroscope 8 reflection and transmission is the same (after transmission in light path more than the 3rd catoptron 703 folded optical paths) substantially.Subsequent optical path just take reflection after light path as example, while being entered the first Amici prism 901 by the light beam after the reflection of wavelength selection spectroscope, wavelength has the light of minute differences after refraction light splitting, by the second imaging len 402, be imaged onto on the 2nd CCD camera 502 and be transferred to computing machine 11, between the second imaging len 402 and the 2nd CCD camera 502, add the first shading sleeve 1001 can prevent that parasitic light enters the 2nd CCD camera 502 around, thereby improved image definition and contrast.
By temperature-wavelength relationship, measurement mechanism is demarcated, can also quantitatively be calculated the wavelength difference of the each luminescence unit of Ba Tiaoshang.For semiconductor laser bar, its cooling water temperature raises, and wavelength can be elongated, and corresponding relation is: Δ λ=k Δ T, and wherein Δ λ is wavelength variable quantity, and Δ T is temperature variation, and k is fixed coefficient.By changing cooling water temperature Δ T, calculate wavelength variable quantity Δ λ, and this variable quantity correspondence the pixel drift delta x of the upper light spot image of imaging CCD, mapping relations can calibrate spectral range corresponding to whole imaging CCD target surface thus.The spatial spectral distribution measurement result figure of bar bar is referring to Fig. 4, our wavelength difference of each luminescence unit that can visually see from this figure.Bar bar flexibility distribution plan also can be demarcated and be obtained quantitative " smile " value by similar mapping method.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (3)
1. the device performance measurement mechanism of a semiconductor laser bar, it is characterized in that, comprise fast axis collimation lenticule (1), described fast axis collimation lenticule (1) is provided with beam-splitter (2) above, the both sides of described beam-splitter (2) are respectively arranged with bar bar flexibility and near field intensity distribution test module and bar bar spatial spectral distribution test module, and described bar bar flexibility and near field intensity distribution test module are all connected with computing machine (11) with described bar bar spatial spectral distribution test module.
2. the device performance measurement mechanism of semiconductor laser bar according to claim 1, it is characterized in that, described bar bar flexibility and near field intensity distribution test module comprise the first slow axis collimation lens (301), the first imaging len (401) and a CCD camera (501), described the first slow axis collimation lens (301) is arranged on a side of described beam-splitter (2), described the first slow axis collimation lens (301) is provided with described the first imaging len (401) above, described the first imaging len (401) is provided with a described CCD camera (501) above, a described CCD camera (501) is connected with described computing machine (11).
3. the device performance measurement mechanism of semiconductor laser bar according to claim 1, it is characterized in that, described bar bar spatial spectral distribution test module comprises the second slow axis collimation lens (302), described the second slow axis collimation lens (302) is arranged on the opposite side of described beam-splitter (2), described the second slow axis collimation lens (302) is provided with adjustable absorption attenuator (6) above, described adjustable absorption attenuator (6) is provided with the first catoptron (701) above, described the first catoptron (701) is provided with the second catoptron (702) above, described the second catoptron (702) is provided with spectroscope (8) above, described spectroscope (8) is provided with long wavelength's transmission module and short wavelength's reflecting module above, described short wavelength's reflecting module comprises the first Amici prism (901), described the first Amici prism (901) is provided with the second imaging len (402) above, described the second imaging len (402) is provided with the first cone (1001) above, described the first cone (1001) is provided with the 2nd CCD camera (502) above, described the 2nd CCD camera (502) is connected with described computing machine (11), described long wavelength's transmission module comprises the 3rd catoptron (703), described the 3rd catoptron (703) is provided with the second Amici prism (902) above, described the second Amici prism (902) is provided with the 3rd imaging len (403) above, described the 3rd imaging len (403) is provided with the second shading sleeve (1002) above, described the second shading sleeve (1002) is provided with the 3rd CCD camera (503) above, described the 3rd CCD camera (503) is connected with described computing machine (11).
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| CN201310669410.0A CN103743549A (en) | 2013-12-11 | 2013-12-11 | Device performance measuring apparatus for semiconductor laser bar |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104865052A (en) * | 2015-06-09 | 2015-08-26 | 西安炬光科技有限公司 | Method and device for testing spatial light beam contour of multi-luminescence unit semiconductor laser |
| CN104897372A (en) * | 2015-06-09 | 2015-09-09 | 西安炬光科技有限公司 | Near-field nonlinear automatic test method for multi-light-emitting-unit semiconductor laser, and device thereof |
| CN105784330A (en) * | 2016-02-29 | 2016-07-20 | 中国科学院长春光学精密机械与物理研究所 | Semiconductor laser bar unit consistency detector and detection method thereof |
| CN109211524A (en) * | 2018-12-10 | 2019-01-15 | 中国人民解放军国防科技大学 | Parameter integrated synchronous testing device for high-power optical fiber laser |
| CN115824588A (en) * | 2022-11-16 | 2023-03-21 | 北京凯普林光电科技股份有限公司 | Device and method for testing packaging performance of bar |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109211524A (en) * | 2018-12-10 | 2019-01-15 | 中国人民解放军国防科技大学 | Parameter integrated synchronous testing device for high-power optical fiber laser |
| CN115824588A (en) * | 2022-11-16 | 2023-03-21 | 北京凯普林光电科技股份有限公司 | Device and method for testing packaging performance of bar |
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Application publication date: 20140423 |