CN201653556U - Comb filtering detector and wavelength monitor - Google Patents
Comb filtering detector and wavelength monitor Download PDFInfo
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- CN201653556U CN201653556U CN2010203007300U CN201020300730U CN201653556U CN 201653556 U CN201653556 U CN 201653556U CN 2010203007300 U CN2010203007300 U CN 2010203007300U CN 201020300730 U CN201020300730 U CN 201020300730U CN 201653556 U CN201653556 U CN 201653556U
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Abstract
The utility model provides a comb filtering detector and a wavelength monitor. The comb filtering detector is provided with a double-optical fiber collimator, a Fabry-Perot etalon and a first photoelectric detector, wherein the double-optical fiber collimator is provided with an input optical fiber and an output optical fiber; the output optical fiber adopts a monomode optical fiber or a multimode optical fiber with the bending radius lower than 10 millimeters; the double-optical fiber collimator is provided with an outer end surface and an inner end surface opposite to the outer end surface; the Fabry-Perot etalon is positioned outside the inner end surface of the double-optical fiber collimator; an optical splitter is arranged between the Fabry-Perot etalon and the double-optical fiber collimator; the Fabry-Perot etalon is provided with a first reflecting surface and a second reflecting surface which are opposite; the optical splitter is positioned outside the first reflecting surface; and the first photoelectric detector is positioned outside the second reflecting surface of the Fabry-Perot etalon. The utility model can reduce the difficulty in machining process, thereby reducing the production cost of the wavelength monitor.
Description
Technical field
The utility model relates to a kind of wavelength detection utensil, especially a kind of wavelength monitor device that is used for the comb filtering detector of fiber optic network wavelength detection and has this comb filtering detector.
Background technology
In the modern communication network, especially in the dense wave division multipurpose network system, widespread use wavelength monitor device is monitored the wavelength of each passage light signal, whether the wavelength of judging monitored light signal is consistent with predetermined wavelength, if inconsistent, also need to judge the drift value between monitored wavelength and the predetermined wavelength, and provide feedback quantity with the form of electric signal, make corresponding adjustment so that send the laser generator of light signal according to feedback quantity, make its wavelength that sends light signal consistent with predetermined wavelength.
Existing wavelength monitor device is provided with Fabry-Perot etalon, and uses the spectral characteristic that Fabry-Perot etalon obtains monitored light signal.Fabry-Perot etalon has two blocks of glass that are parallel to each other, and the middle part of two blocks of glass is air or other light transmission mediums, and light incides interreflection and refraction between two blocks of glass behind the Fabry-Perot etalon, forms to wait the circular interference fringe of inclining.Therefore, the transmitted spectrum of Fabry-Perot etalon is periodic multi-peaks structure, and the spectral characteristic figure of its output as shown in Figure 1.The interval of transmission crest can be chosen as 100G hertz, 50G hertz or 25G hertz, and the characteristic formula is:
Wherein,
(formula 2)
In the formula 1, T is a transmissivity; R is the reflectivity of Fabry-Perot etalon reflecting surface; λ is an optical wavelength in the vacuum; N is a medium refraction index in the Fabry-Perot etalon cavity; D is the physical length of medium in the Fabry-Perot etalon cavity; θ is the angle of light and reflecting surface normal in the Fabry-Perot etalon.
The patent No. is that the United States Patent (USP) of US6621580 has been announced a kind of wavelength monitor device of using Fabry-Perot etalon, and the structure of this wavelength monitor device as shown in Figure 2.The wavelength monitor utensil has two beam splitters 2,3, and the xsect of each beam splitter 2,3 is square, is coated with spectro-film on its diagonal line, forms a light splitting surface 12,16 respectively.
The plane of incidence 11 of beam splitter 2 is over against laser generator 1, light splitting surface 12 and the plane of incidence 11 shapes angle at 45.First exit facet 13 of beam splitter 2 is oppositely arranged with the plane of incidence 11, is provided with beam splitter 3 outside first exit facet 13, and the plane of incidence 15 of beam splitter 3 docks with first exit facet 13 of beam splitter 2.Be provided with a Fabry-Perot etalon 4 outward with second exit facet 18 of beam splitter 2 planes of incidence 11 adjacency, be provided with first photodetector 5 outside the Fabry-Perot etalon 4, be used to receive light signal from Fabry-Perot etalon 4 outgoing.Exit facet 17 outer surveys of beam splitter 3 are provided with second photodetector 6, are used to receive the light signal from 17 outgoing of beam splitter 3 exit facets.
As shown in Figure 2, the light beam L1 that laser generator 1 sends forms transmitted light beam L2 and folded light beam L3 after the plane of incidence 11 of beam splitter 2 is incident to light splitting surface 12, transmitted light beam L2 enters beam splitter 3 after through first transmission plane 13, and forms folded light beam L4 be incident in second photodetector 6 on light splitting surface 16.Folded light beam L3 then is incident in first photodetector 5 through behind the Fabry-Perot etalon 4.
The optical signal frequency response that first photodetector 5 and second photodetector 6 obtain as shown in Figure 3, light intensity is the frequency characteristic that periodically variable curve is first photodetector, 5 acquisition light signals with frequency among the figure, the curve of constant light intensity by second photodetector 6 the frequency characteristic of acquisition light signal, article two, curve periodically intersects, joining locates to equate that promptly first photodetector 5 is located to equate at Frequency point A, A ', B, B ', C, C ' with the light signal strength that second photodetector 6 receives at A, A ', B, B ', C and C '.Suitable incident angle when selecting light beam to incide Fabry-Perot etalon 4, the wavelength that can make each passage of optical fiber communication dense wavelength division multiplexing system that International Telecommunications Union (ITU) (ITU-T) recommends with put A, B, C Pang N institute corresponding wavelength is corresponding one by one.Like this, when the intensity of two photodetector receiving optical signals equated at each Frequency point place, showing did not have drift between input optical wavelength and the predetermined wavelength, promptly equate with predetermined wavelength; When the light signal strength that the light signal that receives when first photodetector 5 receives than second photodetector 6 is big, show that importing light frequency drifts about left; The light signal strength that the light signal that receives when first photodetector receives than second photodetector hour shows that the input light frequency drifts about to the right, and drift value Δ f is definite by the strength variance Δ A of the light signal that two photodetectors receive.
The drift value of the light signal that the wavelength monitor device receives two photodetectors feeds back to laser generator 1 with the form of electric signal, and laser generator 1 is adjusted the wavelength of outgoing light signal according to the feedback information that receives, thereby realizes the monitoring of wavelength.
But, needing to plate spectro-film on the beam splitter diagonal line that this wavelength monitor device need use, the technology difficulty of plated film is big, causes the production cost of wavelength monitor device higher.
Summary of the invention
Fundamental purpose of the present utility model provides the simple comb filtering detector of a kind of processing technology;
Another purpose of the present utility model provides the lower wavelength monitor device of a kind of production cost.
For realizing above-mentioned fundamental purpose, the comb filtering detector that the utility model provides has double-fiber collimator, the Fabry-Perot etalon and first photodetector, double-fiber collimator has an input optical fibre and output optical fibre, output optical fibre is a bending radius less than 10 millimeters single-mode fiber or multimode optical fiber, and double-fiber collimator has an outer face and the inner face relative with described outer face, Fabry-Perot etalon is positioned at the inner face outside of double-fiber collimator, be provided with optical splitter between Fabry-Perot etalon and the double-fiber collimator, Fabry-Perot etalon has the first relative reflecting surface and second reflecting surface, optical splitter is positioned at first reflecting surface outside, and first photodetector is positioned at second reflecting surface outside of Fabry-Perot etalon.
The light signal of input optical fibre incident is through forming transmitted light beam and folded light beam behind the optical splitter, folded light beam is exported through output optical fibre, and transmitted light beam then is incident in first photodetector through Fabry-Perot etalon.
By such scheme as seen, the optical splitter that is used for beam split only is arranged on a side of diplopore optical fiber collimator, folded light beam can avoid using the beam splitter at the diagonal line plated film through the less optical fiber output of bending loss, and the processing technology difficulty of comb filtering detector reduces greatly.
A preferred scheme is that double-fiber collimator has the diplopore kapillary and is positioned at the GRIN Lens of diplopore kapillary one side.Like this, the incident direction of incident beam can gradually change in GRIN Lens, and focuses on the optical splitter, thereby changes the incident angle of incident beam by GRIN Lens.
Further scheme is that optical splitter is the spectro-film that is coated on the GRIN Lens end face.Like this, the processing technology of comb filtering detector further reduces, and its production cost also reduces.
For realizing another above-mentioned purpose, the wavelength monitor utensil that the utility model provides has comb filtering detector and the long detector of all-wave, wherein the comb filtering detector has double-fiber collimator, the Fabry-Perot etalon and first photodetector, double-fiber collimator has an input optical fibre and output optical fibre, output optical fibre is a bending radius less than 10 millimeters single-mode fiber or multimode optical fiber, and double-fiber collimator has an outer face and the inner face relative with described outer face, Fabry-Perot etalon is positioned at the inner face outside of double-fiber collimator, be provided with optical splitter between Fabry-Perot etalon and the double-fiber collimator, Fabry-Perot etalon has the first relative reflecting surface and second reflecting surface, optical splitter is positioned at first reflecting surface outside, and first photodetector is positioned at second reflecting surface outside of Fabry-Perot etalon; Second photodetector that the long detector of all-wave has the single hole optical fiber collimator and is positioned at single hole optical fiber collimator one side, and the single hole optical fiber collimator is connected with the output terminal of output optical fibre.
This shows, the optical fiber of input optical fibre incident is incident in the long detector of all-wave through output optical fibre through the folded light beam that forms behind the optical splitter, and through entering second photodetector behind the single hole optical fiber collimator, incident beam is incident to first photodetector through the transmitted light beam that optical splitter forms behind Fabry-Perot etalon.Like this, the wavelength monitor device does not need to use the beam splitter of plated film on diagonal line, and the processing technology difficulty is lower, thereby reduces its production cost, is convenient to the batch process of wavelength monitor device.
The another kind of wavelength monitor utensil that the utility model provides has comb filtering detector and the long detector of all-wave, the long detector of all-wave first photodetector that has the diplopore optical fiber collimator and be positioned at diplopore optical fiber collimator one side wherein, be provided with optical splitter between the diplopore optical fiber collimator and first photodetector, the diplopore optical fiber collimator has an input optical fibre and output optical fibre, and this output optical fibre is a bending radius less than 10 millimeters single-mode fiber or multimode optical fiber; The comb filtering detector has the single hole optical fiber collimator, it is connected with output optical fibre, the single hole optical fiber collimator has outer face and the inner face relative with the outer face, second photodetector is positioned at the outside of single hole optical fiber collimator inner face, is provided with Fabry-Perot etalon between second photodetector and the single hole optical fiber collimator.
This shows, the optical fiber of input optical fibre incident is through forming folded light beam and transmitted light beam behind the optical splitter, folded light beam is incident in the Fabry-Perot etalon through output optical fibre, and is incident in second photodetector again, and transmitted light beam is then directly into being incident upon first photodetector.Like this, the wavelength monitor device does not use diagonal line to be coated with the beam splitter of spectro-film, and processing technology is simple, and production cost is minimized.
Description of drawings
Fig. 1 is the spectral characteristic figure of Fabry-Perot etalon;
Fig. 2 is the structure principle chart of existing a kind of wavelength monitor device, and figure medium wavelength watch-dog is connected with laser generator;
Fig. 3 is the frequency response chart of existing wavelength monitor device;
Fig. 4 is the structure principle chart of the utility model wavelength monitor device first embodiment;
Fig. 5 is the structure principle chart of the utility model wavelength monitor device second embodiment;
Fig. 6 is the structure principle chart of the utility model wavelength monitor device the 3rd embodiment;
Fig. 7 is the structure principle chart of the utility model wavelength monitor device the 4th embodiment.
The utility model is described in further detail below in conjunction with drawings and Examples.
Embodiment
Wavelength monitor device first embodiment:
Referring to Fig. 4, present embodiment is made up of comb filtering detector 20 and the long detector 40 of all-wave, comb filtering detector 20 has a diplopore optical fiber collimator 21, optical splitter 28, Fabry-Perot etalon 31 and first photodetector 36, and the long detector 40 of all-wave has a single hole optical fiber collimator 41 and second photodetector 42.
In the comb filtering detector 20, the condenser lens that diplopore optical fiber collimator 21 has a diplopore kapillary 22 and is positioned at diplopore kapillary 22 1 sides, this condenser lens is a GRIN Lens 23, after light beam is incident to GRIN Lens 23, its refractive index will change gradually, thereby regulate the shooting angle of light beam.
Diplopore optical fiber collimator 21 has an outer face 24 and the inner face 25 relative with outer face 24, and outer face 24 is towards comb filtering detector 20 arranged outside.Side at inner face 25 is provided with an optical splitter 28, and in the present embodiment, optical splitter 28 is for being coated on the spectro-film on GRIN Lens 23 end faces.
Be provided with an input optical fibre 26 and an output optical fibre 27 in the diplopore optical fiber collimator 21, one end of input optical fibre 26 and output optical fibre 27 extends to outside the outer face 24 of diplopore optical fiber collimator 21, wherein, output optical fibre 27 is a bending diameter less than 10 millimeters single-mode fiber or multimode optical fiber, this optical fiber has minimum bending loss, light signal propagation loss in optical fiber is less, helps the propagation of light signal.
The outside at diplopore optical fiber collimator 21 inner faces 25 is provided with Fabry-Perot etalon 31, Fabry-Perot etalon 31 has first reflecting surface 32 and second reflecting surface 33 relative with first reflecting surface 32, and wherein first reflecting surface 32 is provided with over against optical splitter 28.Be provided with first photodetector 36 in second reflecting surface, 33 outsides, receive the light beam of Fabry-Perot etalon 31 outgoing.
The long detector 40 of all-wave has single hole optical fiber collimator 41, and the output terminal of output optical fibre 27 is connected in the single hole optical fiber collimator 41.One end of single hole optical fiber collimator 41 is provided with second photodetector 42, is used to receive the light beam from 41 outgoing of single hole optical fiber collimator.
The light beam L11 of input optical fibre 26 outgoing is through after the focusing of GRIN Lens 23, be incident in the optical splitter 28 with angle less than 5 °, form folded light beam L12 and transmitted light beam L13, wherein folded light beam L12 enters output beam 27, and is incident in second photodetector 42 behind the single hole optical fiber collimator 41 through the long detector 40 of all-wave.Transmitted light beam L13 then is incident in the Fabry-Perot etalon 31, is incident to first photodetector 36 from the light beam of Fabry-Perot etalon 31 outgoing.Like this, to export separately frequency characteristic at first photodetector 36 and second photodetector 42, this curve as shown in Figure 3, be incident to the incident angle of Fabry-Perot etalon 31 by adjusting transmitted light beam L13, can make the joining of two curves on characteristic frequency point, can judge by the drift value of judging two curves whether the wavelength of laser generator emergent light signal is consistent with predetermined wavelength like this.
Because the optical splitter that the wavelength monitor device uses is the spectro-film that is coated on the GRIN Lens end face, processing technology is simple, can reduce the production cost of wavelength monitor device greatly.And, use bending radius less than 10 millimeters single-mode fiber or multimode optical fiber, the bending loss of beam propagation is less, helps the propagation of light signal.Simultaneously, output optical fibre 27 can crookedly encapsulate, and also helps the miniaturization of wavelength monitor device, reduces the volume of wavelength monitor device.
Wavelength monitor device second embodiment:
Referring to Fig. 5, identical with first embodiment is, present embodiment has comb filtering detector 20 and the long detector 40 of all-wave, wherein comb filtering detector 20 has diplopore optical fiber collimator 21, Fabry-Perot etalon 31 and first photodetector 36, diplopore optical fiber collimator 21 has input optical fibre 26 and output optical fibre 27, and output optical fibre 27 is a bending radius less than 10 millimeters single-mode fiber or multimode optical fiber.The long detector 40 of all-wave has the single hole optical fiber collimator 41 and second photodetector 42, and these are identical with first embodiment, do not repeat them here.
In the present embodiment, the condenser lens that diplopore optical fiber collimator 21 has diplopore kapillary 22 and is positioned at diplopore kapillary 22 1 sides, this condenser lens are plano-convex lens 51, and promptly an end of lens is the plane, and the other end is outer convex globoidal.As seen from Figure 5, plano-convex lens 51 is the plane near diplopore kapillary 22 1 ends, and the other end relative with the plane is cambered surface.Be provided with optical splitter 52 outside the inner face 25 of diplopore optical fiber collimator 21, the optical splitter 52 of present embodiment separates with plano-convex lens 51, and independently is arranged in the comb filtering detector 20.
Change through the direction of propagation, plano-convex lens 51 back from the light beam L21 of input optical fibre 26 incidents, and incide on the optical splitter 52, form folded light beam L22 and transmitted light beam L23, folded light beam L22 enters single hole optical fiber collimator 41 through behind the output optical fibre 27, and is incident in second photodetector 42.Transmitted light beam L23 is incident to first photodetector 36 after being incident to Fabry-Perot etalon 31 again, and the wavelength monitor device can judge whether the wavelength of optical signal of laser generator outgoing is consistent with predetermined wavelength by the frequency response of calculating two photodetector receiving optical signals.
Wavelength monitor device the 3rd embodiment:
Referring to Fig. 6, identical with first, second embodiment, forming of present embodiment by comb filtering detector 20 and the long detector 40 of all-wave, comb filtering detector 20 is provided with diplopore optical fiber collimator 21, optical splitter 62, Fabry-Perot etalon 31 and first photodetector 36, diplopore optical fiber collimator 21 is provided with an input optical fibre 26 and output optical fibre 27, and output optical fibre 27 is a bending radius less than 10 millimeters single-mode fiber or multimode optical fiber.The long detector 40 of all-wave has the single hole optical fiber collimator 41 and second photodetector 42.
The diplopore optical fiber collimator 21 of present embodiment has diplopore kapillary 22 and is positioned at the biconvex lens 61 of diplopore kapillary one side as condenser lens, and two end faces of biconvex lens 61 are outer convex globoidal, and optical splitter 62 is positioned at the outside of lenticular light microscopic 61.
The light beam L31 of input optical fibre 26 incidents is incident on the optical splitter 62 with the incident angle less than 5 ° through biconvex lens 61 backs, and the folded light beam L32 of formation is through output optical fibre 27 outputs.Transmitted light beam L33 then is incident to first photodetector 36 through behind the Fabry-Perot etalon 31.
Wavelength monitor device the 4th embodiment:
Referring to Fig. 7, present embodiment is made up of long detector 70 of all-wave and comb filtering detector 80, wherein the long detector 70 of all-wave has diplopore optical fiber collimator 71, diplopore optical fiber collimator 71 is made up of diplopore kapillary 72 and the GRIN Lens 73 that is positioned at diplopore kapillary 72 1 ends, the outer end of GRIN Lens 73 is provided with optical splitter 78, and optical splitter 78 is for being coated on the spectro-film on GRIN Lens 73 end faces.Diplopore optical fiber collimator 71 also is provided with an input optical fibre 76 and an output optical fibre 77, and output optical fibre 77 is a bending radius less than 10 millimeters single-mode fiber or multimode optical fiber, and the output terminal of output optical fibre 77 is connected with comb filtering detector 80.
75 outsides, outer face at diplopore optical fiber collimator 71 are provided with first photodetector 79, are used to receive the transmitted light beam from optical splitter 78 outgoing.
Be incident to optical splitter 78 through GRIN Lens 73 backs with incident angle from the light beam L41 of input optical fibre 76 incidents less than 5 °, form folded light beam L42 and transmitted light beam L43, folded light beam L42 is incident to output optical fibre 77 and through being incident to Fabry-Perot etalon 82 behind the single hole optical fiber collimator 81, the light beam L44 of formation is incident in second photodetector 85.Like this, after receiving two light beams, first photodetector 79 and second photodetector 85 form frequency response chart respectively, can obtain drift value between laser generator output beam wavelength and the predetermined wavelength by the frequency response of calculating two light beams, and feed back to laser generator, thereby realize monitoring to wavelength with the form of electric signal.
By such scheme as seen, the wavelength monitor device of present embodiment does not use the beam splitter of plated film on diagonal line, and the difficulty of processing of wavelength monitor device is reduced greatly, thereby reduces the production cost of wavelength monitor device, helps the batch process of wavelength monitor device.Simultaneously, as the long detector 70 of all-wave and comb filtering detector 80 be connected optical fiber 77, its bending loss is less, helps the propagation of folded light beam L42.
Certainly, the foregoing description is the preferable embodiment of the utility model, during practical application more variation can also be arranged, for example, among the 4th embodiment, can use plano-convex lens or biconvex lens to substitute GRIN Lens and use as condenser lens, when using plano-convex lens or biconvex lens, optical splitter need independently be arranged in the long detector of all-wave discretely with condenser lens; Perhaps, when using GRIN Lens as condenser lens, optical splitter also is independently to be provided with discretely with GRIN Lens; Or Fabry-Perot etalon is selected air-gap Fabry-Perot etalon or Solid Cavity Fabry-Perot etalon etc. for use, also can realize the purpose of this utility model, and these variations also should be included in the protection domain of the utility model claim.
Claims (10)
1. the comb filtering detector is characterized in that: comprise
Double-fiber collimator (21), it has an input optical fibre (26) and output optical fibre (27), and described output optical fibre (27) is a bending radius less than 10 millimeters single-mode fiber or multimode optical fiber; Described double-fiber collimator (21) has an outer face and the inner face relative with described outer face;
Fabry-Perot etalon (31), the inner face outside that it is positioned at described double-fiber collimator (21) is provided with optical splitter (28) between described Fabry-Perot etalon (31) and the described double-fiber collimator (21); Described Fabry-Perot etalon (28) has the first relative reflecting surface and second reflecting surface, and described optical splitter (28) is positioned at described first reflecting surface outside;
First photodetector (36), it is positioned at second reflecting surface outside of described Fabry-Perot etalon (31).
2. comb filtering detector according to claim 1 is characterized in that:
Described double-fiber collimator (21) has diplopore kapillary (22) and is positioned at the condenser lens of described diplopore kapillary (22) one sides.
3. comb filtering detector according to claim 2 is characterized in that:
Described condenser lens is GRIN Lens (23).
4. comb filtering detector according to claim 3 is characterized in that:
Described optical splitter (28) is for being coated on the spectro-film on described GRIN Lens (23) end face.
5. comb filtering detector according to claim 2 is characterized in that:
Described focusing transmissive mirror is plano-convex lens or biconvex lens.
6. the wavelength monitor device is characterized in that: comprise
Comb filtering detector (20), it has
Double-fiber collimator (21), it has an input optical fibre (26) and output optical fibre (27), and described output optical fibre (27) is a bending radius less than 10 millimeters single-mode fiber or multimode optical fiber; Described double-fiber collimator (21) has an outer face and the inner face relative with described outer face;
Fabry-Perot etalon (31), the inner face outside that it is positioned at described double-fiber collimator (21) is provided with optical splitter (28) between described Fabry-Perot etalon (31) and the described double-fiber collimator (21); Described Fabry Perot etalon (28) has the first relative reflecting surface and second reflecting surface, and described optical splitter (28) is positioned at described first reflecting surface outside;
First photodetector (36), it is positioned at second reflecting surface outside of described Fabry-Perot etalon (31);
The long detector of all-wave (40), second photodetector (42) that it has single hole optical fiber collimator (41) and is positioned at described single hole optical fiber collimator (41) one sides, described single hole optical fiber collimator (41) is connected with the output terminal of described output optical fibre (27).
7. wavelength monitor device according to claim 6 is characterized in that:
Described double-fiber collimator (21) has diplopore kapillary (22) and is positioned at the condenser lens of described diplopore kapillary (22) one sides.
8. wavelength monitor device according to claim 7 is characterized in that:
Described condenser lens is GRIN Lens (23), and described optical splitter (28) is for being coated on the spectro-film on described GRIN Lens (23) end face.
9. the wavelength monitor device is characterized in that: comprise
The long detector of all-wave (70), first photodetector (79) that it has diplopore optical fiber collimator (71) and is positioned at described diplopore optical fiber collimator (71) one sides is provided with optical splitter (78) between described diplopore optical fiber collimator (71) and described first photodetector (79); Described diplopore optical fiber collimator (71) has an input optical fibre (76) and output optical fibre (77), and described output optical fibre is a bending radius less than 10 millimeters single-mode fiber or multimode optical fiber;
Comb filtering detector (80), it has
Single hole optical fiber collimator (81), it is connected with described output optical fibre (77), and described single hole optical fiber collimator (81) has outer face and the inner face relative with described outer face;
Second photodetector (85), it is positioned at the outside of described single hole optical fiber collimator (81) inner face, is provided with Fabry-Perot etalon (82) between described second photodetector (85) and the described single hole optical fiber collimator (81).
10. wavelength monitor device according to claim 9 is characterized in that:
Described diplopore optical fiber collimator (71) has a GRIN Lens (73), and described optical splitter (78) is for being coated on the spectro-film on described GRIN Lens (73) end face.
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| CN2010203007300U CN201653556U (en) | 2010-01-15 | 2010-01-15 | Comb filtering detector and wavelength monitor |
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| CN2010203007300U CN201653556U (en) | 2010-01-15 | 2010-01-15 | Comb filtering detector and wavelength monitor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104079345A (en) * | 2013-03-25 | 2014-10-01 | 三菱电机株式会社 | Wavelength monitor and wavelength monitoring method |
| CN104348083A (en) * | 2013-08-09 | 2015-02-11 | 三菱电机株式会社 | Wavelength monitor and optical module |
| WO2017116781A1 (en) * | 2015-12-31 | 2017-07-06 | Afl Telecommunications Llc | Encircled flux compliant test apparatus |
| CN112858805A (en) * | 2020-12-29 | 2021-05-28 | 西南技术物理研究所 | Frequency response characteristic parameter measuring device for quadrant photoelectric detector |
-
2010
- 2010-01-15 CN CN2010203007300U patent/CN201653556U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104079345A (en) * | 2013-03-25 | 2014-10-01 | 三菱电机株式会社 | Wavelength monitor and wavelength monitoring method |
| CN104079345B (en) * | 2013-03-25 | 2017-05-10 | 三菱电机株式会社 | Wavelength monitor and wavelength monitoring method |
| CN104348083A (en) * | 2013-08-09 | 2015-02-11 | 三菱电机株式会社 | Wavelength monitor and optical module |
| CN104348083B (en) * | 2013-08-09 | 2017-10-31 | 三菱电机株式会社 | wavelength monitor and optical module |
| WO2017116781A1 (en) * | 2015-12-31 | 2017-07-06 | Afl Telecommunications Llc | Encircled flux compliant test apparatus |
| US10782206B2 (en) | 2015-12-31 | 2020-09-22 | Afl Telecommunications Llc | Encircled flux compliant test apparatus |
| CN112858805A (en) * | 2020-12-29 | 2021-05-28 | 西南技术物理研究所 | Frequency response characteristic parameter measuring device for quadrant photoelectric detector |
| CN112858805B (en) * | 2020-12-29 | 2023-02-28 | 西南技术物理研究所 | Frequency response characteristic parameter measuring device for quadrant photoelectric detector |
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