WO2005015139A1 - 光測定装置 - Google Patents
光測定装置 Download PDFInfo
- Publication number
- WO2005015139A1 WO2005015139A1 PCT/JP2004/011493 JP2004011493W WO2005015139A1 WO 2005015139 A1 WO2005015139 A1 WO 2005015139A1 JP 2004011493 W JP2004011493 W JP 2004011493W WO 2005015139 A1 WO2005015139 A1 WO 2005015139A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- output terminal
- optical
- input terminal
- wavelength band
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 168
- 238000005259 measurement Methods 0.000 claims description 33
- 238000001514 detection method Methods 0.000 claims description 10
- 239000013307 optical fiber Substances 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 5
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 4
- 239000004065 semiconductor Substances 0.000 claims description 3
- 230000003595 spectral effect Effects 0.000 abstract 2
- 238000001228 spectrum Methods 0.000 description 26
- 238000010586 diagram Methods 0.000 description 9
- 239000000284 extract Substances 0.000 description 6
- 229910001369 Brass Inorganic materials 0.000 description 3
- 239000010951 brass Substances 0.000 description 3
- 238000000605 extraction Methods 0.000 description 2
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910000530 Gallium indium arsenide Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/33—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
Definitions
- the present invention relates to measurement of a wavelength characteristic and an optical spectrum of an object to be measured such as an optical fiber.
- the spectrum analyzer has a spectroscope and a photodetector (for example, see Patent Document 1 (Japanese Patent Application Laid-Open No. 2002-34067 (Summary))).
- a wavelength characteristic measuring device for measuring the wavelength characteristic of an object to be measured such as an optical fiber has a light source for emitting light to the object to be measured and a photodetector for detecting light transmitted through the object to be measured.
- a wavelength characteristic measuring device may be used, and then a spectrum analyzer may be used.
- the present invention provides an apparatus having a minimum configuration capable of measuring both the wavelength characteristic and the optical spectrum characteristic.
- a wavelength band component extracting unit that extracts a component of a predetermined wavelength band from incident light, a branch that branches the predetermined wavelength band component into a first direction and a second direction Means, a first input terminal, a second input terminal, a first output terminal, and a second output terminal, the first input terminal being located at one end of the device under test, and the second input terminal being located in the first direction of the branching means.
- Optical connection means connected to the side, an optical amplification means for receiving light from the second output terminal, and outputting amplified light to the incident light receiving section of the wavelength band component extraction means for amplifying the light, and a first output And a light detecting means for detecting light, wherein the other end of the device under test is connected to the second direction side of the branching means, and the optical connection means comprises: (1) a first input terminal; Connect the first output terminal and the second input terminal and the second output terminal at the same time. Or (2) at the same time connects the first input terminal and a second output terminal configured to connect a second input terminal and a first output terminal.
- the wavelength band component extracting unit extracts a component of a predetermined wavelength band from the incident light.
- the branching unit branches the predetermined wavelength band component into a first direction and a second direction.
- the stage has a first input terminal, a second input terminal, a first output terminal, and a second output terminal, the first input terminal being at one end of the device under test, and the second input terminal being the first of the branch means. Connect to the direction side.
- the optical amplifier receives the light from the second output terminal and outputs amplified light to the incident light receiver of the wavelength band component extractor.
- the light detecting means is connected to the first output terminal and detects light.
- the other end of the device under test is connected to the branching means in the second direction.
- the optical connection means may be configured to: (1) connect the first input terminal and the first output terminal, and at the same time connect the second input terminal and the second output terminal, or (2) the first input terminal And the second output terminal, and simultaneously, the second input terminal and the first output terminal.
- the optical amplifier can be a fiber amplifier or a semiconductor optical amplifier.
- the wavelength band component extracting means can make the predetermined wavelength band variable.
- the device under test can be an optical fiber or an object that transmits a light beam.
- the optical measuring device configured as described above, there are a plurality of wavelength band component extracting means, different predetermined wavelength bands from which the means are extracted, and a plurality of optical detecting means, each of which has a light detecting means.
- This wavelength band can correspond to a predetermined wavelength band.
- FIG. 1 is a block diagram showing a configuration of a light measuring device 1 according to the first embodiment of the present invention.
- FIG. 2 is a diagram showing an operation when the optical measurement device 1 according to the first embodiment is used as a wavelength characteristic measurement device.
- FIG. 3 is a diagram illustrating an operation when the optical measurement device 1 according to the first embodiment is used as a spectrum analyzer.
- FIG. 4 is a block diagram showing a configuration of the optical measurement device 1 according to the second embodiment of the present invention.
- FIG. 5 is a diagram illustrating an operation when the optical measurement device 1 according to the second embodiment is used as a wavelength characteristic measurement device.
- FIG. 6 is a diagram showing an operation when the optical measurement device 1 according to the second embodiment is used as a spectrum analyzer (for a long wavelength band).
- FIG. 7 is a diagram showing an operation when the optical measurement device 1 according to the second embodiment is used as a spectrum analyzer (for a short wavelength band).
- FIG. 1 is a block diagram showing a configuration of a light measuring device 1 according to the first embodiment of the present invention.
- the optical measurement device 1 is connected to a device under test (DUT: Device Under Test) 2.
- the DUT 2 is preferably an optical fiber, but may be an optical fiber.
- the optical measuring device 1 includes an optical amplifier (optical amplification means) 10, a spectroscope (wavelength component extracting means) 12, a power blur (branching means) 14, an optical input terminal 16, an optical output terminal 18, and an optical switch. (Optical connection means) 20; light detection unit 30; sweep controller 32;
- the optical amplifier (optical amplification means) 10 amplifies the incident light.
- the optical amplifier 10 may be a fiber amplifier such as an EDFA (erbium doped fiber amplifier) or a semiconductor optical amplifier.
- the light output from the optical amplifier 10 is called amplified light.
- the spectroscope (wavelength component extracting means) 12 extracts a component of a predetermined wavelength band from the amplified light output from the optical amplifier 10.
- the predetermined wavelength band can be changed by the sweep controller 32. That is, a predetermined wavelength band can be swept.
- the force brass (branching means) 14 has an input terminal 14a, output terminals 14b, and 14c.
- the power brassier 14 branches the light received by the input terminal 14a to output terminals 14b and 14c.
- the input terminal 14 a receives a predetermined wavelength band component output from the spectroscope 12.
- the predetermined wavelength band component is output to the output terminals 14b and 14c.
- the output terminal (first direction side) 14 b is connected to the second input terminal 22 b of the optical switch 20, and the output terminal (second direction side) 14 c is connected to the optical output terminal 18.
- the optical input terminal 16 is connected to one end of the device under test 2 and receives light emitted from the device under test 2.
- Optical output terminals 18 are to be measured It is connected to the other end of the object 2 and allows light to enter the device under test 2.
- the optical switch (optical connection means) 20 is a DPDT (double ports double throws) type switch.
- the optical switch 20 has a first input terminal 22a, a second input terminal 22b, a first output terminal 24a, and a second output terminal 24b.
- the first input terminal 22a and the second input terminal 22b are terminals for receiving light.
- the first input terminal 22 a is connected to one end of the device under test 2 via the optical input terminal 16.
- the second input terminal 2 2 b is connected to the output terminal 14 b of the force brush 14.
- the first output terminal 24a and the second output terminal 24b are terminals for outputting light.
- the first output terminal 24a is connected to the light detection unit 30.
- the second output terminal 24 b is connected to the input side of the optical amplifier 10.
- the second output terminal 24 b is connected to the input side (incident light receiving unit) of the spectroscope 12 via the optical amplifier 10.
- the optical switch 20 (1) connects the second input terminal 22b to the second output terminal 24b and simultaneously connects the first input terminal 22a to the first output terminal 24a.
- the output terminal 14 b of the force brass 14 is connected to the input side of the optical amplifier 10. It will be.
- the light detection section 30 detects light received from the first output terminal 24a. Specifically, it converts the received light into an electrical signal.
- the sweep controller 32 sweeps a predetermined wavelength band in the spectroscope 12. The predetermined wavelength band is also sent to the display 34.
- the display 34 displays the predetermined wavelength band determined by the sweep controller 32 on the X axis (horizontal axis) and the electric signal output from the photodetector 30 on the Y axis (vertical axis).
- the optical switch 20 is operated to (1) connect the second input terminal 22 b and the second output terminal 24 b and at the same time, connect the first input terminal 22 a And the first output terminal 24a.
- the amplified light output from the optical amplifier 10 is turned into a spectroscope 12
- the light passes through the input terminal 14a, the output terminal 14b, and the second input terminal 22b, the second output terminal 24b of the optical switch 20, and is input to the optical amplifier 10. Therefore, the amplified light output from the optical amplifier 1 ⁇ is input to the optical amplifier 10 and can be said to be positive feedback. Because of the positive feedback, the intensity of the amplified light output from the optical amplifier 10 increases. Moreover, since the output of the optical amplifier 10 passes through the spectroscope 12, the intensity of the predetermined wavelength band component is increased.
- the light passes through the DUT 2 and is emitted from one end of the DUT 2.
- the emitted light is received by the light input terminal 16.
- the light received by the optical input terminal 16 passes through the first input terminal 22 a and the first output terminal 24 a of the optical switch 20 and is received by the light detection unit 30.
- the light detector 30 converts the received light into an electric signal.
- the display 34 displays the predetermined wavelength band determined by the sweep controller 32.
- the X-axis displays the electrical signal output by the photodetector 30 along the Y-axis (vertical axis). By observing the display on the display 34, the wavelength characteristics of the DUT 2 can be determined.
- the optical measurement device 1 functions as a wavelength characteristic measurement device that measures the wavelength characteristics of the device under test 2.
- the optical switch 20 is operated to (2) connect the second input terminal 22 b and the first output terminal 24 a, and at the same time, connect the first input terminal 22 Connect a to the second output terminal 2 4 b.
- (P) light emitted from one end of the device under test 2 is received by the optical input terminal 16.
- (Q) the light received by the optical input terminal 16 passes through the first input terminal 22 a and the second output terminal 24 b of the optical switch 20 and is input to the optical amplifier 10. You.
- the (R) optical amplifier 10 amplifies the received light and outputs the amplified light.
- (S) a predetermined wavelength band component of the amplified light is extracted by the spectroscope 12.
- the extracted predetermined wavelength band component is output from the output terminal 14 b via the input terminal 14 a of the power brush 14.
- the light emitted from the (T) output terminal 14 b is an optical switch 20.
- the light detection unit 30 converts the received light into an electric signal.
- the display 34 displays the predetermined wavelength band determined by the sweep controller 32 on the X axis (horizontal axis) and the electric signal output from the photodetector 30 on the Y axis (vertical axis).
- the optical measurement device 1 functions as a spectrum analyzer that measures the spectrum of light emitted from one end of the device under test 2. Moreover, since a predetermined wavelength band component is extracted from the light amplified by the optical amplifier 10, the optical amplifier 10 functions as a preamplifier. Therefore, the optical measurement device 1 functions as a highly sensitive spectrum analyzer.
- the variable wavelength light source used in the wavelength characteristic measuring device is constituted by the optical amplifier 10 and the spectroscope 12.
- a high-sensitivity spectrum analyzer uses an optical amplifier 10 and a spectroscope 12.
- the optical amplifier 10 and the spectroscope 12 included in the spectrum analyzer can be used as a variable wavelength light source.
- the optical amplifier 10 and the spectroscope 12 of the variable wavelength light source included in the wavelength characteristic measuring device can be used.
- both the wavelength characteristic measuring device and the spectrum analyzer can use the photodetector 30. Therefore, both the wavelength characteristic measuring device and the spectrum analyzer are optical amplifier 10 and spectrometer. 12 and the photodetector 30 can be used. Therefore, the members (optical amplifier 10, spectroscope 12, and light detector 30) of the spectrum analyzer and the wavelength characteristic measuring device can be used effectively.
- FIG. 4 is a block diagram showing a configuration of the optical measurement device 1 according to the second embodiment of the present invention.
- Optical measuring device 1 includes optical amplifiers (optical amplification means) 10a, 10b, spectrometers (wavelength component extraction means) 12a, 12b, power blurs (branching means) 14, optical input terminals 16; optical output terminal 18; optical switch (optical connection means) 20; photodetectors 30a, 30b; sweep controller 32;
- optical amplifiers 10a and 10b are the same as the optical amplifier 10 in the first embodiment. However, the optical amplifier 10a outputs light in a longer wavelength band than the optical amplifier 10b.
- the optical amplifier 10a is an optical amplifier for a long wavelength band and the optical amplifier 10b is an optical amplifier for a short wavelength band.
- the spectroscope 12a extracts a component in a predetermined wavelength band from the amplified light output from the optical amplifier 10a.
- the spectroscope 12b extracts a component in a predetermined wavelength band from the amplified light output from the optical amplifier 10b.
- the specified wavelength band Can be changed by the sweep controller 32. That is, a predetermined wavelength band can be swept.
- the spectrometer 12a extracts light in a longer wavelength band than the spectrometer 12b.
- the coupler 14 has an input terminal 14a, output terminals 14b, and 14c.
- the power brush 14 branches the light received by the input terminal 14a to the output terminals 14b and 14c.
- the input terminal 14a receives a predetermined wavelength band component output from the spectrometers 12a and 12b. Therefore, the predetermined wavelength band component is output to the output terminals 14b and 14c.
- the output terminal (first direction side) 14 b is connected to the second input terminal 22 b of the optical switch 20, and the output terminal (second direction side) 14 c is connected to the optical output terminal 18. You.
- the optical input terminal 16 and the optical output terminal 18 are the same as in the first embodiment, and the description is omitted.
- the optical switch (optical connection means) 20 is a DP3T (double ports 3 throws) type switch.
- the optical switch 20 has a first input terminal 22 a, a second input terminal 22 b, a first output terminal 24 a, a second output terminal 24 b, a third output terminal 26 a, and a fourth output. It has terminals 26b.
- the first input terminal 22a and the second input terminal 22b are the same as in the first embodiment, and the description is omitted.
- the first output terminal 24a and the second output terminal 24b are terminals for outputting light.
- the first output terminal 24a is connected to the photodetector 30a.
- the second output terminal 24b is connected to the input side of the optical amplifier 10a.
- the third output terminal 26a and the fourth output terminal 26b are terminals for outputting light.
- the third output terminal 26a is connected to the detector 30b.
- the fourth output terminal 26b is connected to the input side of the optical amplifier 10b.
- the optical switch 20 (1) connects the second input terminal 22b and the second output terminal 24b and simultaneously connects the first input terminal 22a and the first output terminal 24a.
- One of the following two connections is performed: the first input terminal 22a and the fourth output terminal 26b are connected simultaneously with the two input terminals 22b and the third output terminal 26a.
- the output terminal 14 b of the force brass 14 is connected to the input side of the optical amplifier 10 a. .
- the light detector 30a detects light received from the first output terminal 24a. Specifically, it converts the received light into an electric signal.
- the light detection section 3 Ob detects light received from the second output terminal 24b. Specifically, it converts the received light into an electric signal.
- the wavelength band of light detected by the light detection unit 30a corresponds to the wavelength band (long wavelength band) of light output from the optical amplifier 10a.
- the wavelength band of light detected by the light detection unit 30b corresponds to the wavelength band (short wavelength band) of light output from the optical amplifier 10b.
- the light detector 30a is an InGaAs photodiode
- the light detector 30b is a Si photodiode.
- the sweep controller 32 sweeps a predetermined wavelength band in the spectrometers 12a and 12b.
- the predetermined wavelength band is also sent to the display 34.
- the display 34 displays the predetermined wavelength band determined by the sweep controller 32 on the X axis (horizontal axis), and the electric signals output from the photodetectors 30a and 30b on the Y axis (vertical axis). Display.
- the optical switch 20 is operated to (1) connect the second input terminal 22 b and the second output terminal 24 b and at the same time simultaneously connect the first input terminal 22 a And the first output terminal 24a. Then, (A) the amplified light output from the optical amplifier 10a is divided into the spectroscope 12a, the input terminal 14a of the power brawler 14a, the output terminal 14b, and the second input terminal 2 of the optical switch 20. 2b, passes through the second output terminal 24b and is input to the optical amplifier 10a. Therefore, the amplified light output from the optical amplifier 10a is input to the optical amplifier 10a, which can be said to be positive feedback. Because of the positive feedback, the intensity of the amplified light output from the optical amplifier 10a increases.
- the intensity of the predetermined wavelength band component is increased. Furthermore, since a predetermined wavelength band is swept by the sweep controller 32, light passing through the optical amplifier 10a and the spectroscope 12a has a wavelength that changes. By extracting this light, a positive feedback system having the optical amplifier 10a and the spectroscope 12a can be used as a variable wavelength light source.
- the light passing through the optical amplifier 10 a and the spectroscope 12 a enters the input terminal 14 a of the power blur 14. Light entering the input terminal 14a branches to the output terminals 14b and 14c. The light branched to the output terminal 14 c passes through the light output terminal 18.
- the light passing through the light output terminal 18 is incident on the other end of the DUT 2. Then, the light passes through the DUT 2 and is emitted from one end of the DUT 2. The emitted light is received by the light input terminal 16.
- the light received by the optical input terminal 16 passes through the first input terminal 22 a and the first output terminal 24 a of the optical switch 20, and Can be received.
- the light detector 30a converts the received light into an electrical signal Convert to
- the display 34 displays the predetermined wavelength band determined by the sweep controller 32 on the X axis (horizontal axis), and the electric signals output from the photodetectors 30a and 30b on the Y axis (vertical axis). Display.
- the optical measurement device 1 functions as a wavelength characteristic measurement device that measures the wavelength characteristics of the device under test 2.
- the optical switch 20 is operated to (2) connect the second input terminal 22 b and the first output terminal 24 a and at the same time, connect the first input terminal 22 Connect a to the second output terminal 2 4 b.
- (P) light emitted from one end of the device under test 2 is received by the optical input terminal 16.
- (Q) the light received by the optical input terminal 16 passes through the first input terminal 22 a and the second output terminal 24 b of the optical switch 20 and is input to the optical amplifier 10 a. Is done.
- the (R) optical amplifier 10a amplifies the received light and outputs the amplified light as amplified light. Further, the (S) predetermined wavelength band component of the amplified light is extracted by the spectroscope 12a. The extracted predetermined wavelength band component is input terminal of coupler 14 The light is output from the output terminal 14 b via the 14 a. Then, the light emitted from the (T) output terminal 14b passes through the second input terminal 22b and the first output terminal 24a of the optical switch 20 and is received by the photodetector 30a. Can be The light detector 30a converts the received light into an electric signal.
- the display 34 displays the predetermined wavelength band determined by the sweep controller 32 on the X axis (horizontal axis), and the electric signals output from the photodetectors 30a and 30b on the Y axis (vertical axis). Display. By observing the display contents of the display 34, the component of the long wavelength band of the light emitted from one end of the device under test 2 can be understood.
- the optical switch 20 is operated to (3) connect the second input terminal 22 b and the third output terminal 26 a and at the same time, connect the first input terminal 22 Connect a to the fourth output terminal 26 b. Then, (P) light emitted from one end of the device under test 2 is received by the optical input terminal 16.
- (Q) the light received by the optical input terminal 16 passes through the first input terminal 22 a and the fourth output terminal 26 b of the optical switch 20 and is input to the optical amplifier 10 b. Is done.
- the (R) optical amplifier 10b amplifies the received light and outputs it as amplified light. Power.
- a predetermined wavelength band component of the (S) amplified light is extracted by the spectroscope 12b.
- the extracted predetermined wavelength band component is output from the output terminal 14 b via the input terminal 14 a of the power brush 14.
- the light emitted from the (T) output terminal 14 b passes through the second input terminal 22 b and the third output terminal 26 a of the optical switch 20, and is received by the light detection unit 3 Ob.
- the light detector 30b converts the received light into an electric signal.
- the display 34 displays the predetermined wavelength band determined by the sweep controller 32 on the X axis (horizontal axis), and the electric signals output from the photodetectors 30a and 30b on the Y axis (vertical axis). Display. By observing the contents displayed on the display 34, the short-wavelength band component of the light emitted from one end of the device under test 2 can be determined. Therefore, the optical measurement device 1 functions as a spectrum analyzer that measures the spectrum of the light emitted from one end of the device under test 2 (see FIGS. 6 and 7).
- the optical measurement device 1 functions as a high-sensitivity spectrum analyzer. According to the second embodiment, the same effects as in the first embodiment can be obtained. Moreover, when the optical measurement device 1 is used as a spectrum analyzer, the first implementation is performed because the photodetector 30a corresponds to a long wavelength band and the photodetector 30b corresponds to a short wavelength band. Components in a wider wavelength band than in the case of the form can be detected.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Spectrometry And Color Measurement (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/567,446 US7230691B2 (en) | 2003-08-08 | 2004-08-04 | Photometer |
JP2005512996A JP4384119B2 (ja) | 2003-08-08 | 2004-08-04 | 光測定装置 |
DE112004001453T DE112004001453B4 (de) | 2003-08-08 | 2004-08-04 | Fotometer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003290787 | 2003-08-08 | ||
JP2003-290787 | 2003-08-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005015139A1 true WO2005015139A1 (ja) | 2005-02-17 |
Family
ID=34131606
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/011493 WO2005015139A1 (ja) | 2003-08-08 | 2004-08-04 | 光測定装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7230691B2 (ja) |
JP (1) | JP4384119B2 (ja) |
DE (1) | DE112004001453B4 (ja) |
WO (1) | WO2005015139A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7897912B2 (en) * | 2006-05-25 | 2011-03-01 | Photo Research, Inc. | Spectral and luminance measuring device employing array and single-channel detectors in combination |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9059803B2 (en) * | 2012-09-28 | 2015-06-16 | Intel Corporation | Mechanism for facilitating an optical instrumentation testing system employing multiple testing paths |
EP3179220A1 (en) * | 2015-12-10 | 2017-06-14 | Aragon Photonics Labs, S.L.U. | System and method of optical spectrum analysis |
DE102015122442B4 (de) | 2015-12-21 | 2018-08-02 | Endress + Hauser Flowtec Ag | Messgerät der Mess- und Automatisierungstechnik |
US11411644B2 (en) | 2020-07-30 | 2022-08-09 | Openlight Photonics, Inc. | Multi-lane optical-electrical device testing using automated testing equipment |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10307078A (ja) * | 1997-05-08 | 1998-11-17 | Anritsu Corp | モードロックリングレーザを用いた光部品の波長分散測定装置 |
JP2001230475A (ja) * | 2000-02-16 | 2001-08-24 | Nippon Telegr & Teleph Corp <Ntt> | 波長可変レーザ光源 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4138645A (en) * | 1977-05-31 | 1979-02-06 | Cutler-Hammer, Inc. | Wideband signal calibration system |
US6016213A (en) * | 1996-07-08 | 2000-01-18 | Ditech Corporation | Method and apparatus for optical amplifier gain and noise figure measurement |
JP3107027B2 (ja) * | 1997-12-25 | 2000-11-06 | 日本電気株式会社 | 光部品特性測定システム |
US6603112B1 (en) * | 1998-02-25 | 2003-08-05 | Massachusetts Institute Of Technology | Method and apparatus for detecting malfunctions in communication systems |
JP3693971B2 (ja) | 2001-03-16 | 2005-09-14 | 富士通株式会社 | 光スペクトルアナライザー及び光スペクトル検出方法 |
US6646727B2 (en) * | 2001-05-16 | 2003-11-11 | Bahaa E. A. Saleh | Polarization mode dispersion characterization apparatus and method |
-
2004
- 2004-08-04 JP JP2005512996A patent/JP4384119B2/ja active Active
- 2004-08-04 US US10/567,446 patent/US7230691B2/en not_active Expired - Fee Related
- 2004-08-04 WO PCT/JP2004/011493 patent/WO2005015139A1/ja active Application Filing
- 2004-08-04 DE DE112004001453T patent/DE112004001453B4/de not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10307078A (ja) * | 1997-05-08 | 1998-11-17 | Anritsu Corp | モードロックリングレーザを用いた光部品の波長分散測定装置 |
JP2001230475A (ja) * | 2000-02-16 | 2001-08-24 | Nippon Telegr & Teleph Corp <Ntt> | 波長可変レーザ光源 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7897912B2 (en) * | 2006-05-25 | 2011-03-01 | Photo Research, Inc. | Spectral and luminance measuring device employing array and single-channel detectors in combination |
Also Published As
Publication number | Publication date |
---|---|
DE112004001453B4 (de) | 2008-12-04 |
US7230691B2 (en) | 2007-06-12 |
DE112004001453T5 (de) | 2006-07-20 |
JP4384119B2 (ja) | 2009-12-16 |
US20060203228A1 (en) | 2006-09-14 |
JPWO2005015139A1 (ja) | 2006-10-05 |
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