WO2006018897A1 - レーザ位相差検出装置およびレーザ位相制御装置 - Google Patents
レーザ位相差検出装置およびレーザ位相制御装置 Download PDFInfo
- Publication number
- WO2006018897A1 WO2006018897A1 PCT/JP2004/012012 JP2004012012W WO2006018897A1 WO 2006018897 A1 WO2006018897 A1 WO 2006018897A1 JP 2004012012 W JP2004012012 W JP 2004012012W WO 2006018897 A1 WO2006018897 A1 WO 2006018897A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optical path
- laser
- phase difference
- path length
- unit
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 123
- 238000001514 detection method Methods 0.000 claims description 53
- 238000000605 extraction Methods 0.000 claims description 9
- 238000002789 length control Methods 0.000 claims description 6
- 230000003321 amplification Effects 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000003786 synthesis reaction Methods 0.000 claims description 2
- 230000002194 synthesizing effect Effects 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 12
- 230000001427 coherent effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000010363 phase shift Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
Classifications
-
- 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
- G01J9/00—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength
- G01J9/02—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength by interferometric methods
Definitions
- Laser phase difference detection device and laser phase control device are Laser phase difference detection device and laser phase control device
- the present invention relates to a laser phase difference detection device and a laser phase control device.
- a method for obtaining a desired light intensity by condensing a plurality of laser beams simultaneously on a target is generally known.
- a laser device in order to concentrate energy on a small target at a long distance, after splitting the laser beam oscillated by one main oscillator force into multiple laser beams, they are individually amplified, and after amplification A laser beam that is arranged to bundle multiple laser beams (this is called the main output beam) is focused on the target.
- a laser beam focusing technique this is called coherent coupling
- the wavefront sensor shown in FIG. 5 of Patent Document 1 is an example of such a laser phase difference detector, and a part of a laser beam oscillated by a main oscillator force that is a source of a plurality of laser beams is split into a beam splitter.
- the light split in step 1 is used as reference light, the interference intensity between the reference light and the main output beam is observed, and the relative phase difference between the individual laser beams is detected.
- Patent Document 1 Japanese Patent Laid-Open No. 11-340555 (FIG. 5)
- the conventional laser phase difference detection apparatus Since the conventional laser phase difference detection apparatus is configured as described above, it has been necessary to extract a part of the light oscillated from the main oscillator and use it as reference light. For this reason, when the distance between the position where the main output beam is obtained and the main oscillator is large, it is necessary to propagate the reference light over a long distance, which increases the size of the apparatus and increases the cost. Furthermore, if time fluctuations in the optical path length occur due to changes in atmospheric density or vibrations in the optical path through which the reference light propagates, the time fluctuations in the optical path length affect the detection of the phase difference.
- the correction in order to correct the phase difference using the detected phase difference, the correction must be made in consideration of the time fluctuation component of the optical path length of the reference light, so that the correction amount increases and the system becomes stable. There was a problem that it might not be fixed. In addition, another means for detecting and correcting the time fluctuation component of the optical path length of the reference light is required, which increases the cost. Furthermore, in order to apply to coherent coupling of a main output beam with a coherence length as short as several tens of ⁇ m, such as an ultrashort pulse laser, the optical path length allowed for interference between the reference beam and the main output beam is allowed. There was a problem that it took a lot of effort to adjust because the difference range was small.
- the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a laser phase difference detection device that is small and low in cost and easy to use.
- Another object of the present invention is to obtain a laser phase control device using such a laser phase difference detection device.
- the laser phase difference detection apparatus is configured such that the individual laser beams constituting the laser beam group are the first laser beam group that travels in the first optical path and the second laser that travels in the second optical path.
- An optical path branching unit that branches into a beam group, a beam selection extraction unit that selectively passes one laser beam from the first laser beam group as reference light, and an optical path length that makes the optical path length of the first optical path variable
- the optical path length is provided with a variable section, an optical path combining section that combines the reference light and the individual laser beams constituting the second laser beam group to generate interference light, and a photodetector that detects the intensity of the interference light.
- the optical path length at which the intensity of the interference light is maximized is detected for each laser beam constituting the second laser beam group, and based on the optical path length. Between the individual laser beams The phase difference is what Mel asked.
- FIG. 1 is a diagram showing a configuration of a laser phase difference detection apparatus according to Embodiment 1 of the present invention.
- 2] A diagram showing a configuration of a laser phase difference detection device according to the second embodiment of the present invention.
- FIG. 3 is a diagram showing a configuration of a laser phase difference detection device according to Embodiment 3 of the present invention.
- FIG. 4 is a diagram showing a configuration of a laser phase difference detection device according to Embodiment 4 of the present invention.
- FIG. 5 is a diagram showing a configuration of a laser phase difference detection device according to a fifth embodiment of the present invention.
- FIG. 6 is a diagram showing a configuration of a laser phase control device according to a sixth embodiment of the present invention.
- FIG. 1 is a diagram showing a configuration of a laser phase difference detection apparatus 100 according to Embodiment 1 of the present invention.
- the laser phase difference detection apparatus 100 includes a beam splitter (optical path branching unit) 2, a beam splitter (optical path combining unit) 3, a beam selection extraction unit 4, a reflecting mirror 5, a reflecting mirror 6, and an optical path length variable unit. 7, equipped with a two-dimensional light detector (light detector) 10.
- the laser phase difference detection apparatus 100 is an application of a general Matsuhonda interferometer.
- the laser beam oscillated from the laser oscillator is branched and extracted by a branch extraction means (not shown), and the beam diameter is enlarged or reduced as required by an enlargement / reduction means (not shown).
- This is a beam to be measured (laser beam group, main output beam) 1.
- the measured beam 1 is arranged so that two or more branched laser beams are bundled. As shown in FIG. 1, here, four rectangular beams (a, b, c, d) are arranged. It is arranged in the shape of a rice field.
- the beam splitter 2 amplitude-divides the beam 1 to be measured, and reflects the reflected component (first laser beam group) in the downward direction (first optical path) in FIG. Transmission toward the optical path) Divide into components (second laser beam group).
- the transmitted component of the beam 1 to be measured is reflected by the reflecting mirror 6, changes the traveling direction by 90 degrees, and reaches the beam splitter 3 as the light to be measured 9.
- the reflected component of the beam 1 to be measured is propagated by selectively extracting only the beam a in the beam selection extraction unit 4, and the beams b, c, and d are blocked.
- the beam a selected and extracted by the beam selection / extraction unit 4 is reflected by the reflecting mirror 5 and changes the traveling direction by 90 degrees, and then the traveling direction is changed by the optical path length variable unit 7 to be transmitted to the beam splitter 3 as reference light 8. It reaches.
- the variable optical path length unit 7 has a function of returning an incident beam in a direction very close to the incident direction.
- the transmitted component of the beam 1 to be measured is changed from the beam splitter 2.
- the optical path length to the beam splitter 3 and the optical path length from the reflected component to the beam splitter 3 can be changed.
- the optical path length variable unit 7 is configured by a retroreflector capable of adjusting the position.
- the beam splitter 3 combines the reference light 8 and the measured light 9 to cause interference.
- the interference light enters the two-dimensional photodetector 10 and the intensity of the interference light is converted into an electrical signal.
- the intensity of the interference light observed by the two-dimensional photodetector 10 is expressed by equation (1).
- I is the interference light intensity
- al is the amplitude of the reference light 8
- a2 is the amplitude of the measured light 9
- ⁇ 1 is the phase of the reference light 8
- ⁇ 2 is the phase of the measured light 9.
- the interference light intensity I changes sinusoidally depending on the phase difference ( ⁇ 1 ⁇ ⁇ 2) between the reference light 8 and the measured light 9, and ( ⁇ 1 ⁇ ⁇ When 2) is 0, the interference light intensity I is maximum.
- the optical path length variable unit 7 scans the optical path length of the reference light 8 with a stroke of one wavelength or less, and detects the optical path length that maximizes the interference light intensity for each of the beams a, b, c, and d.
- the optical path length at which the interference light intensity is maximum is different for each of the beams a, b, c, and d, the phases of the beams are out of phase. You can know the phase difference.
- a part of the beam 1 to be measured is used as the reference light 8, so that the laser main oscillator force also extracts the reference light separately and introduces it to the laser phase difference detection apparatus 100.
- the apparatus can be reduced in size and cost.
- the optical path lengths of the reference light 8 and the measured light 9 are changed using the optical path length variable unit 7, the interference optical path can be contained in a small apparatus.
- the interference optical path is configured to fit within a small device, even if the measured beam has a short coherence length, such as a 1-force S-pulse laser, the optical path length between the reference light and the measured light Is relatively easy to match with the required accuracy.
- the apparatus can be reduced in size and the portability can be improved.
- adjustment for measurement is easy.
- laser phase difference detection apparatus 100 is configured using a Mach-Zehnder interferometer, but may be configured using a two-beam interferometer of another type.
- a retroreflector is used as the optical path length variable unit 7, for example, a spatial phase modulator may be used.
- the two-dimensional photodetector 10 may be any detector that can detect the intensity of interference light for a plurality of laser beams constituting the beam 1 to be measured.For example, a two-dimensional photodetector 10 in which a required number of single-element photodiodes are arranged is used. May be.
- the optical path length variable unit 7 when the optical path length is scanned by the optical path length variable unit 7 in order to detect the phase difference between the individual laser beams constituting the beam 1 to be measured, the amount of change in the optical path length is grasped with high accuracy. There is a need. However, the optical path length from the beam splitter 2 to the beam splitter 3 may fluctuate from time to time due to changes in temperature and vibration.
- the second embodiment is provided with a means for correcting this optical path length variation.
- FIG. 2 is a block diagram showing a configuration of laser phase difference detection apparatus 200 according to the second embodiment.
- the same reference numerals as those in FIG. 1 represent equivalent components.
- the laser phase difference detection device 200 includes an optical path length difference variation detection unit 11.
- the optical path length difference detector 11 detects the measurement error due to the optical path length fluctuation in the optical path from the beam splitter 2 to the beam splitter 3, so that the reference light 8 and the measured light 9 Measure the intensity of the interference light in the part corresponding to beam a.
- the reference light 8 is a beam a selected and extracted from one of the measured beams 1 branched by the beam splitter 2, interference light between the reference light 8 and the portion of the measured light 9 corresponding to the beam a.
- the intensity reflects only the optical path length difference from beam splitter 2 to beam splitter 3. Therefore, it is possible to accurately know the optical path length variation from the beam splitter 2 to the beam splitter 3 based on the interference light intensity of the portion corresponding to the beam a of the reference light 8 and the measured light 9.
- the output signal of the two-dimensional photodetector 10 is signal-processed, and the optical path Variations in length difference can be corrected.
- the optical path length difference detection unit 11 detects the change in the optical path length difference between the reference light 8 and the measured light 9 from the beam splitter 2 to the beam splitter 3. Since the output signal from the two-dimensional optical detector 10 is signal-processed to correct for variations in optical path length differences, the effects of optical path length differences are eliminated, and phase shift detection reliability and stability are improved. Can be increased.
- optical path length variation detector 7 instead of correcting the variation in the optical path length by signal processing of the output signal, the optical path length variation detector 7 or an optical path length control means different from the optical path length variable unit 7 is used.
- the output signal may be regressed to control the optical path length difference.
- the optical path length is scanned by the optical path length variable unit 7.
- the optical path length cannot be scanned, and therefore the first embodiment cannot be applied.
- the first embodiment is expanded so as to be compatible with single shot panorama.
- FIG. 3 is a block diagram showing a configuration of laser phase difference detection apparatus 300 according to the third embodiment.
- the laser phase difference detection device 300 includes a spatial phase difference providing unit 20.
- the spatial phase difference providing unit 20 acts to generate a phase difference in the cross section of the reference light 8, and is constituted by, for example, a flat glass having a thickness difference. Next, the operation will be described.
- the phase difference ( ⁇ 1 ⁇ 2) can be obtained using equation (1). Therefore, it is possible to estimate the phase difference from the interference light intensity due to a single light reception without scanning the optical path length by the optical path length variable unit 7.
- the interference light intensity changes sinusoidally with respect to the phase difference ( ⁇ 1_ ⁇ 2)
- a phase difference is generated in the cross section of the reference light 8. Assuming that the optical path length difference generated in the cross section of the reference light 8 is ⁇ 1, in addition to the interference light intensity expressed by Equation (1), the interference light intensity shown by Equation (2) can be observed simultaneously.
- the beam 1 to be measured is a single pulse laser, it is possible to detect the relative phase difference with a single light reception.
- the spatial phase difference providing unit 20 generates only one phase difference spatially, but may generate two or more different phase differences.
- the amplitudes al and a2 may be measured in advance, or a measuring means for branching and measuring the light to be measured 9 is separately provided so that it is measured simultaneously with the detection of the phase shift. May be.
- the fourth embodiment improves the SZN ratio of the first embodiment.
- FIG. 4 is a block diagram showing a configuration of laser phase difference detection apparatus 400 according to the fourth embodiment.
- the laser phase difference detection apparatus 400 includes a beam diameter enlargement unit 30.
- the beam diameter enlarging unit 30 expands the reference light 8 to a diameter equal to that of the light to be measured 9 and can use, for example, a Galileo telescope. Next, the operation will be described.
- the beam diameter expanding unit 30 makes the beam diameter of the reference light 8 equal to the beam diameter of the measured light 9. For this reason, the ratio of the light to be measured 9 used for the interference light is increased, and the light use efficiency is improved. Therefore, the intensity of the beam 1 to be measured can be reduced.
- the reference light 8 can be a highly accurate plane wave. This makes it possible to detect from the interference light intensity the phase distribution within the beam cross-section that is just the phase shift between the beams a, b, c, and d that make up the beam 1 to be measured.
- the beam diameter enlarging unit 30 is installed on the optical path of the reference light 8.
- the beam diameter reducing unit is provided on the optical path of the measured light 9, and the beam diameter of the measured light 9 is set. The same effect can be obtained even if the beam diameter of the reference light 8 and the beam diameter of the light 9 to be measured are made equal by reducing the above.
- the fifth embodiment improves the S / N ratio of the first embodiment.
- FIG. 5 is a block diagram showing a configuration of laser phase difference detection apparatus 500 according to the fifth embodiment.
- the laser phase difference detection apparatus 500 includes an optical path length control unit 41 and a signal processing unit 42.
- the optical path length control unit 41 drives the optical path length variable unit 7 to modulate the optical path length of the reference light 8 with a constant frequency and amplitude.
- the modulation is realized by using a vibration generating element such as a voice coil.
- the signal processing unit 42 stores the time-series change of the interference light intensity signal that is the output of the two-dimensional photodetector 10 and performs Fourier transform.
- the interference light intensity I changes sinusoidally depending on the phase difference ( ⁇ 1_ ⁇ 2). Therefore, the amplitude ⁇ ⁇ of the interference light intensity I when the optical path length control unit 41 modulates the optical path length of the reference light 8 also changes almost sinusoidally depending on the phase difference ( ⁇ 1- ⁇ 2).
- the phase difference ( ⁇ 1 ⁇ 2) can be known.
- the amplitude ⁇ of the interference light intensity I is obtained by extracting the power spectrum of the modulation frequency from the Fourier transform result that is the output of the signal processing unit 42.
- the phase difference ( ⁇ 1 — ⁇ 2) cannot be determined from the power spectrum, in order to determine whether the phase is positive or negative, for example, a modulated signal is extracted from the optical path length control unit 41 to generate a waveform of the interference light intensity. Perform lock-in detection.
- the sixth embodiment shows a laser phase control device using the laser phase difference detection device of the first to fifth embodiments.
- FIG. 6 is a diagram showing a configuration of a laser phase control device 600 according to the sixth embodiment.
- the laser phase control device 600 includes a laser light source 50, a distribution unit 51, a phase delay variable device (phase delay variable unit) 52, an amplification unit 53, a synthesis unit 54, a laser beam extraction unit 55, a phase difference.
- a detection device (phase difference detection unit) 56 and a phase difference control device (phase difference control unit) 57 are provided.
- the laser beam oscillated from the laser light source 50 is distributed by the distributing unit 51 into a plurality of mutually coherent laser beams.
- the distribution unit 51 is composed of a plurality of beam splitters.
- the phase delay variable device 52 changes the relative phase difference of the laser beam to be coherently coupled.
- the method of changing the relative phase difference is realized by changing the position of the mirror 521.
- the amplifying unit 53 amplifies the intensity of a plurality of laser beams output from the distributing unit 51 and whose relative phase difference is changed by the phase delay variable device 52, and expands and outputs the beam system as necessary.
- the synthesizer 54 is composed of a mirror or the like, and converts the spatial arrangement and angle of each laser beam so that the laser beam that is the output of the amplifier 53 is coherently coupled.
- the laser beam extraction unit 55 is a beam splitter. A plurality of laser beams output from the combining unit 54 are extracted for supply to the phase difference detection device 56.
- the phase difference detection device 56 is the laser phase difference detection device according to any one of the first to fifth embodiments, and detects a phase difference using the plurality of laser beams extracted by the laser beam extraction unit 55 as the measurement target beam 1. And output.
- the phase difference control device 57 calculates the difference between the relative phase difference of the plurality of laser beams detected by the phase difference detection device 56 and the relative phase difference stored in advance according to the purpose, and based on this difference. Because the difference between the relative error of multiple laser beams and the relative phase difference stored in advance and depending on the purpose is calculated, the relative phase difference of multiple laser beams becomes the target value based on this difference. The relative phase difference correction amount is calculated and a regression control signal is output to the phase delay variable device 52.
- any one of the laser phase difference detection devices according to the first embodiment 15 is used for the phase difference detection device 56. Therefore, the first embodiment 5 The same effect as above can be obtained, and the coherently coupled laser beam and the relative phase difference of the plurality of laser beams can be maintained in a predetermined state.
- the laser phase difference detection apparatus is suitable as an optical measurement technique and an optical control technique in all apparatuses that handle a plurality of mutually coherent laser beams in a controlled manner.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/658,315 US7768699B2 (en) | 2004-08-20 | 2004-08-20 | Laser phase difference detecting device and laser phase control device |
PCT/JP2004/012012 WO2006018897A1 (ja) | 2004-08-20 | 2004-08-20 | レーザ位相差検出装置およびレーザ位相制御装置 |
EP04771973A EP1796228A1 (en) | 2004-08-20 | 2004-08-20 | Laser phase difference detector and laser phase controller |
JP2006531143A JP4459961B2 (ja) | 2004-08-20 | 2004-08-20 | レーザ位相差検出装置およびレーザ位相制御装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2004/012012 WO2006018897A1 (ja) | 2004-08-20 | 2004-08-20 | レーザ位相差検出装置およびレーザ位相制御装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006018897A1 true WO2006018897A1 (ja) | 2006-02-23 |
Family
ID=35907294
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/012012 WO2006018897A1 (ja) | 2004-08-20 | 2004-08-20 | レーザ位相差検出装置およびレーザ位相制御装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7768699B2 (ja) |
EP (1) | EP1796228A1 (ja) |
JP (1) | JP4459961B2 (ja) |
WO (1) | WO2006018897A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170184449A1 (en) * | 2014-06-26 | 2017-06-29 | Sony Corporation | Imaging device and method |
JP2017519987A (ja) * | 2014-06-16 | 2017-07-20 | コミサリヤ・ア・レネルジ・アトミク・エ・オ・エネルジ・アルテルナテイブ | 光ビームの特性評価のためのデバイスおよび方法 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8159737B2 (en) * | 2009-04-27 | 2012-04-17 | Phase Sensitive Innovations, Inc. | Controlling the phase of optical carriers |
US8184362B2 (en) * | 2009-06-15 | 2012-05-22 | The Boeing Company | Phase control and locking method for coherently combining high-gain multi-stage fiber amplifiers |
CN102175333B (zh) * | 2011-01-25 | 2014-06-18 | 北京工业大学 | 利用同步移相干涉术测量激光脉冲宽度与相对相位的方法与装置 |
GB2490143B (en) * | 2011-04-20 | 2013-03-13 | Rolls Royce Plc | Method of manufacturing a component |
TWI473373B (zh) * | 2012-11-30 | 2015-02-11 | Ind Tech Res Inst | 間隔時間可調脈衝序列產生裝置 |
GB2566284A (en) | 2017-09-07 | 2019-03-13 | Univ Aston | Laser detection system |
JP7071849B2 (ja) * | 2018-03-09 | 2022-05-19 | リオン株式会社 | パーティクルカウンタ |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11340555A (ja) * | 1998-04-24 | 1999-12-10 | Trw Inc | 同位相波面制御を備えた高平均パワ―固体レ―ザ―システム |
JP2000056280A (ja) * | 1998-08-11 | 2000-02-25 | Trw Inc | 位相面制御を有する高平均パワ―・ファイバ・レ―ザ・システム |
JP2000323774A (ja) * | 1999-04-01 | 2000-11-24 | Trw Inc | 高速並列波面センサを有する改良高速平均パワー・ファイバ・レーザ・システム |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4798437A (en) * | 1984-04-13 | 1989-01-17 | Massachusetts Institute Of Technology | Method and apparatus for processing analog optical wave signals |
JP2767000B2 (ja) * | 1990-01-23 | 1998-06-18 | 日本電信電話株式会社 | 導波路分散測定方法および装置 |
JP2003130609A (ja) | 2001-10-26 | 2003-05-08 | Hitachi Cable Ltd | マッハツェンダ干渉計光センサ |
-
2004
- 2004-08-20 JP JP2006531143A patent/JP4459961B2/ja not_active Expired - Fee Related
- 2004-08-20 US US11/658,315 patent/US7768699B2/en not_active Expired - Fee Related
- 2004-08-20 WO PCT/JP2004/012012 patent/WO2006018897A1/ja active Application Filing
- 2004-08-20 EP EP04771973A patent/EP1796228A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11340555A (ja) * | 1998-04-24 | 1999-12-10 | Trw Inc | 同位相波面制御を備えた高平均パワ―固体レ―ザ―システム |
JP2000056280A (ja) * | 1998-08-11 | 2000-02-25 | Trw Inc | 位相面制御を有する高平均パワ―・ファイバ・レ―ザ・システム |
JP2000323774A (ja) * | 1999-04-01 | 2000-11-24 | Trw Inc | 高速並列波面センサを有する改良高速平均パワー・ファイバ・レーザ・システム |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017519987A (ja) * | 2014-06-16 | 2017-07-20 | コミサリヤ・ア・レネルジ・アトミク・エ・オ・エネルジ・アルテルナテイブ | 光ビームの特性評価のためのデバイスおよび方法 |
JP2017519988A (ja) * | 2014-06-16 | 2017-07-20 | コミサリヤ・ア・レネルジ・アトミク・エ・オ・エネルジ・アルテルナテイブ | 光ビームの特性評価のためのデバイスおよび方法 |
US20170184449A1 (en) * | 2014-06-26 | 2017-06-29 | Sony Corporation | Imaging device and method |
US11054304B2 (en) * | 2014-06-26 | 2021-07-06 | Sony Corporation | Imaging device and method |
Also Published As
Publication number | Publication date |
---|---|
US7768699B2 (en) | 2010-08-03 |
EP1796228A1 (en) | 2007-06-13 |
JP4459961B2 (ja) | 2010-04-28 |
US20080304139A1 (en) | 2008-12-11 |
JPWO2006018897A1 (ja) | 2008-05-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9115971B2 (en) | Measuring apparatus | |
CN101430190B (zh) | 干涉仪 | |
JP2010515919A5 (ja) | ||
JP6654948B2 (ja) | パルス光の波形計測方法及び波形計測装置 | |
JP5336921B2 (ja) | 振動計測装置及び振動計測方法 | |
WO2014203654A1 (ja) | 距離測定装置、形状測定装置、加工システム、距離測定方法、形状測定方法および加工方法 | |
JP2017038094A (ja) | コヒーレントレーザアレイ制御システムおよび方法 | |
JP2002082045A (ja) | 光計測システム | |
JP2023546168A (ja) | マッチドフィルタリングを用いたコヒーレントlidarシステムにおけるミラーによるドップラー拡散を補償する技術 | |
JP4459961B2 (ja) | レーザ位相差検出装置およびレーザ位相制御装置 | |
JP2009053096A (ja) | 測定装置 | |
JP5421013B2 (ja) | 位置決め装置及び位置決め方法 | |
JP4786540B2 (ja) | レーザー光路長差検出装置、レーザー位相制御装置並びにコヒーレント光結合装置 | |
JP5949341B2 (ja) | 距離測定装置 | |
US20070024854A1 (en) | Heterodyne array detector | |
JP4388334B2 (ja) | 光反応装置及び光反応制御方法 | |
JP2012132711A (ja) | パルス間位相ズレ測定装置、オフセット周波数制御装置、パルス間位相ズレ測定方法、オフセット周波数制御方法 | |
JP2013033014A (ja) | ドップラー振動計測装置及びドップラー振動計測方法 | |
JP3235738B2 (ja) | アブソリュート測長器 | |
JPH06186337A (ja) | レーザ測距装置 | |
WO2022209789A1 (ja) | 光ビーム生成装置および光探知機 | |
CN115655663B (zh) | 全光纤结构激光器的线宽测量方法及系统 | |
JP7246596B2 (ja) | ブリルアン周波数シフト分布測定装置及びブリルアン周波数シフト分布測定方法 | |
JP2003090704A (ja) | 光ヘテロダイン干渉計 | |
JPH01201122A (ja) | 光パルス測定方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2006531143 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 11658315 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2004771973 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 2004771973 Country of ref document: EP |