WO2005019922A1 - 全光スイッチ - Google Patents
全光スイッチ Download PDFInfo
- Publication number
- WO2005019922A1 WO2005019922A1 PCT/JP2004/011597 JP2004011597W WO2005019922A1 WO 2005019922 A1 WO2005019922 A1 WO 2005019922A1 JP 2004011597 W JP2004011597 W JP 2004011597W WO 2005019922 A1 WO2005019922 A1 WO 2005019922A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- input
- nonlinear
- signal light
- optical
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/3515—All-optical modulation, gating, switching, e.g. control of a light beam by another light beam
- G02F1/3517—All-optical modulation, gating, switching, e.g. control of a light beam by another light beam using an interferometer
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2/00—Demodulating light; Transferring the modulation of modulated light; Frequency-changing of light
- G02F2/004—Transferring the modulation of modulated light, i.e. transferring the information from one optical carrier of a first wavelength to a second optical carrier of a second wavelength, e.g. all-optical wavelength converter
Definitions
- the second light 52 is input to the input port 108, and is subjected to a refractive index change (non-linear phase shift) generated in the non-linear waveguide elements 101 and 102 after being branched by the 3 dB coupler 103.
- the CW light 52 that has passed through the nonlinear waveguide elements 101 and 102 is recombined by the 3 dB coupler 104 to become an RZ data modulation signal light, and is output from the output port 109 as wavelength converted light.
- the CW light 52 of wavelength ⁇ passing through the nonlinear waveguide element 101 becomes nonlinear.
- the optical output of wavelength ⁇ from the output port 109 is turned on.
- 1 2 is set not to be output from the output port 125. That is, when there is no input of the NRZ signal light 53, the CW light 52 of wavelength ⁇ passing through both arms interferes with the coupler 124.
- Patent Document 1 JP-A-7-20510
- Patent Document 2 Japanese Patent Application Laid-Open No. 7-199240
- Non-Patent Document 1 Kazuhito TAJIMA, ⁇ All-Optical Switch-Off Time Unrestricted by Carrier LifetimeJ, December 1993, Japanese Journal of Applied Physics, Vol. 32, p.L1746-L1749
- the signal light continues to be input to both the nonlinear waveguide element 101 and the nonlinear waveguide element 102 when the signal light input intensity is not zero, and the change in the refractive index of both arms is cancelled. And the output of the wavelength-converted light is turned off.
- the all-optical switch of Conventional Example 2 driven by NRZ signal light has a problem that it is difficult to operate at a high bit rate.
- the all-optical switch of Conventional Example 2 since the signal light is turned on and off, the carrier density change in the process of turning on and off, the heading force from on to off, and the carrier density change in the process of turning off are determined by the carrier lifetime, the The waveform of the converted output light has a heading from off to on, a heading off in the process, and a tailing in the heading.
- the carrier lifetime power is S100 picoseconds
- the waveform changes in a shorter time than this.
- the present invention has been made in view of a powerful problem, and eliminates waveform distortion of wavelength-converted output light that depends on carrier life, and enables all-optical driving with high bit rate NRZ signal light.
- the purpose is to provide a switch.
- the all-optical switch includes a first input port to which a non-return-to-zero signal light is input, a second input port to which carrier light is input, and first and second optical paths.
- a distribution unit that distributes the light input to the first and second input ports to the first and second optical paths, respectively, and a signal provided in the first optical path and distributed by the distribution unit.
- One of the lights The signal light and the carrier light distributed by the distribution unit are input, and the refractive index changes nonlinearly by the one signal light to shift the phase of the one carrier light nonlinearly.
- the other trust A delay unit for allowing light to be input, and a combining unit for combining light that has passed through the first and second optical paths, wherein a time during which the input of the other signal light is delayed by the delay unit is And a relaxation time shorter than the relaxation time of the change in the nonlinear refractive index in the first and second nonlinear optical elements.
- the effect of the trailing process of the phase change in the linear optical element can be offset to some extent by the rise of the phase change in the second nonlinear optical element.
- the amount of phase change generated in each nonlinear optical element is relaxed to the initial state over a period of time corresponding to the carrier lifetime. Since the phase change in the second nonlinear optical element also starts to relax around the time when the relaxation in the first nonlinear optical element enters the tailing process toward the initial state, the phase change in the first nonlinear optical element
- the effect of the tailing process can be offset to some extent by relaxing the phase change in the second nonlinear optical element.
- the all-optical switch can use, as carrier light, a clock pulse light synchronized with an NRZ signal light that is not limited to CW light.
- clock light is used as the carrier light, NRZ-to-RZ conversion becomes possible.
- the delay unit may, for example, change an optical path length from the distribution unit to the second nonlinear optical element in the second optical path from the distribution unit in the first optical path to the first nonlinear optical element. It can be formed by making it longer than the optical path length to the element.
- the nonlinear refractive index change occurs during the process of switching the switch operation from off to on and the process of switching the on-force off. It is possible to operate with NRZ signal light of a wider bit rate than the conventional all-optical switch because it can be operated without being affected by the relaxation time.
- FIG. 4 is a diagram showing a configuration of an all-optical switch according to a third embodiment of the present invention.
- FIG. 5 is a diagram showing a configuration of an all-optical switch according to a fourth embodiment of the present invention.
- FIG. 6 is a diagram illustrating a configuration of an all-optical switch according to a fifth embodiment of the present invention.
- FIG. 7 is a diagram showing a configuration of an all-optical switch of Conventional Example 1.
- FIG. 8 is a diagram showing a configuration of an all-optical switch of Conventional Example 2.
- variable delay circuit 11, 11, 111;
- variable attenuator
- phase adjuster
- FIG. 1 is a diagram showing a configuration of an all-optical switch according to the present embodiment.
- the all-optical switch of the present embodiment includes a 3 dB coupler 10 for distributing a signal light (NRZ signal light) 53 input from an input port 7 and modulated by a non-return-to-zero method to two.
- NRZ signal light signal light
- the nonlinear waveguide element 1 having S ⁇ A and the phase adjuster 14 are provided between the 3dB coupler 5 and the 3dB coupler 4, and the 3dB power A nonlinear waveguide element 2 having S ⁇ A and a phase adjuster 15 are provided between 6 and the 3 dB force bra 4.
- the non-linear waveguide elements 1 and 2 change the refractive index of input light non-linearly and output it.
- the phase adjusters 14 and 15 are arranged to prevent the output light derived from the CW light 52 from being output from the output port 9 when the NRZ signal light 53 is not input. When there is no input, the phase difference when the CW light passing through both arms interferes with the 3dB power bracket 4 is set to be half the wavelength.
- the optical path length from the 3 dB coupler 10 to the nonlinear waveguide element 2 longer than the optical path length from the 3 dB coupler 10 to the nonlinear waveguide element 1 by delaying the input of the NRZ signal light. Is formed. Then, the input time difference ⁇ ⁇ between the two NRZ signal lights provided by the variable delay circuit 11 is set to be shorter than the relaxation time of the change in the nonlinear refractive index in the nonlinear waveguide elements 1 and 2, that is, shorter than the carrier lifetime. Is set.
- the variable attenuators 12 and 13 attenuate the NRZ signal light input to the nonlinear waveguide element 2 more than the NRZ signal light input to the nonlinear waveguide element 1.
- the operation of the all-optical switch according to the present embodiment will be described.
- the NRZ signal light 53 of wavelength ⁇ is input to the input port 7, and the CW light 52 of wavelength ⁇ is input to the input port 8.
- the NRZ signal light 53 input to the input port 7 is split into two by the 3 dB coupler 10, and one of the NRZ signal lights passes through the variable delay circuit 11, the variable attenuator 12, and the 3 dB power bra 5.
- the light sequentially passes through and is input to the nonlinear waveguide element 1.
- the other NRZ signal light is input to the nonlinear waveguide element 2 through the variable attenuator 13 and the 3 dB power bra 6.
- the variable delay circuit 11 provides a time difference of ⁇ ⁇ ⁇ ⁇ between the NRZ signal light input to the nonlinear waveguide element 1 and the NRZ signal light input to the nonlinear waveguide element 2.
- the nonlinear waveguide elements 1 and 2 undergo a refractive index change (non-linear phase shift), respectively.
- the CW light that has passed through the nonlinear waveguide elements 1 and 2 is multiplexed again by the 3 dB power blur 4 that is the synthesizing unit, becomes NRZ data modulation light, and is output from the port 9 as wavelength converted light.
- the carrier density in the nonlinear waveguide element 1 recovers, and the state approaches a steady state.
- the constant at that time is determined by the carrier lifetime, and the time change of the carrier density shows a tail.
- the phase difference between the two arms returns to the initial state after the lapse of the time ⁇ , the signal light input to the nonlinear waveguide element 2 is also turned off, and the recovery of the carrier density starts.
- the recovery of the carrier density that is, the nonlinear shift amount also shows a similar time change between the nonlinear waveguide element 1 and the nonlinear waveguide element 2. Therefore, thereafter, the change in the phase difference between the two arms is suppressed, and the influence of the tailing of the carrier density change does not appear on the optical output of the wavelength ⁇ .
- the wavelength shift is performed by inputting the NRZ signal light of wavelength
- the switching operation is realized.
- FIG. 2A is a waveform diagram showing a pattern of the NRZ signal light input to the input port 7
- FIG. 2B is a waveform diagram showing the nonlinear phase shift in the nonlinear waveguide elements 1 and 2.
- FIG. 2C is a waveform diagram showing an eye pattern of the output light intensity output from the output port 9.
- n 1 or 2
- SCW the intensity of the CW light 52 input together with the NRZ signal light 53
- h Planck's constant
- V is the optical frequency
- ⁇ is the optical confinement coefficient
- k is a proportionality constant
- M is a state in which no NRZ signal light is input tot
- ⁇ in Equation 6 above is the phase difference between the two arms set by the phase adjusters 14 and 15.
- the time difference ⁇ when the NRZ signal light is input to the nonlinear waveguide elements 1 and 2 of both arms is set to a value corresponding to the relaxation time of the change in the nonlinear refractive index, so it is not necessary to change it according to the operating bit rate. Les ,. That is, bit rate independent operation is possible with the same configuration.
- FIG. 3 is a diagram illustrating the configuration of the all-optical switch according to the present embodiment.
- the same components as those of the all-optical switch and the components of the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.
- the all-optical switch according to the present embodiment is input from the input port 21 through the signal light (NRZ signal light) 53 and data input through the non-return-to-zero data modulation method.
- this all-optical switch has two arms in the above-described Mach-Zehnder type optical circuit in which the optical path lengths are different from each other, and the arm having the short optical path length is provided with a non-linear waveguide having an SOA.
- An element 1 and a phase adjuster 14 are provided, and a non-linear waveguide element 2 having SOA and a phase adjuster 15 are provided on an arm having a long optical path length.
- the phase adjusters 14 and 15 in the all-optical switch of the present embodiment are configured to prevent output light derived from the CW light 52 from being output from the output port 25 when the NRZ signal light 53 is not input. If there is no input of the NRZ signal light 53, the phase difference when the CW light passing through both arms interferes with the power blur 24 is set to be a half wavelength.
- the output of the wavelength converted light from 25 is turned on. After a lapse of time ⁇ , the nonlinear phase shift of the light of wavelength ⁇ that has passed through the nonlinear waveguide element 2 is passed through the nonlinear waveguide element 1.
- the input of the NRZ signal light of wavelength I is turned on.
- the tailing caused by the carrier lifetime is suppressed.
- the nonlinear waveguide element 1 and the And the carrier density at 2 recover to a steady state.
- the constant at that time is determined by the carrier lifetime, and the time variation of the carrier density shows a tail.
- the Mach-Zehnder optical circuit of this all-optical switch has a different optical path length between the two arms, first, the nonlinear phase shift of the light of wavelength ⁇ passing through the nonlinear waveguide element 1 is reduced.
- the phase difference between the two arms approaches the initial state, and the output of the wavelength-converted light from the output port 25 is turned off.
- the time ⁇ has elapsed and the phase difference between the two arms has returned to the initial state, the wavelength that has passed through the nonlinear waveguide element 2;
- phase shift also recovers. Therefore, the change in the phase difference between the two arms is suppressed thereafter, and the effect of the tailing of the carrier density change does not appear on the optical output of the wavelength ⁇ .
- Both the wavelength ⁇ and the wavelength; I are set within the gain region of the SOA.
- the NRZ signal light 53 input to the port 7 is split into two by the 3 dB coupler 10, one of which is The light passes through the variable delay circuit 11, the variable attenuator 12, and the 3dB force bra 5 in this order, and is input to the nonlinear waveguide element 1.
- the other passes through the variable attenuator 13 and the 3 dB force bra 6 in this order, and is input to the nonlinear waveguide element 2.
- the signal light input to the nonlinear waveguide elements 1 and 2 is given a time difference of ⁇ .
- the nonlinear waveguide elements 1 and 2 have a reduced carrier density and a changed refractive index.
- the light 54 is once branched by the 3 dB power blur 3, one of which is input to the nonlinear waveguide element 1 and the other is input to the nonlinear waveguide element 2, and undergoes a change in the refractive index (nonlinear phase shift). Then, the clock pulse light that has passed through the nonlinear waveguide elements 1 and 2 is multiplexed again by the 3 dB power blur 4, becomes RZ data modulated light, and is output from the port 9 as wavelength converted light.
- the output light having the wavelength I is output from the port 9 by the phase adjusters 14 and 15.
- the carrier density in the nonlinear waveguide element 1 recovers and approaches a steady state.
- the constant at that time is determined by the carrier lifetime, and the time change of the carrier density shows a tail.
- the phase difference between the two arms returns to the initial state after the elapse of the time ⁇ , the signal light input to the nonlinear waveguide element 2 is also turned off, and the carrier density decreases. Recovery begins. As a result, the change in the phase difference between the two arms is suppressed thereafter, and the effect of the tailing of the carrier density change is present in the operation in which the clock pulse light of the wavelength is turned off.
- the all-optical switch of the present embodiment even when the clock pulse light is input as the carrier light, in the process of switching the switch operation from off to on and the process of switching on the power off, The operation can be performed without being affected by the relaxation time of the nonlinear refractive index change. As a result, it is possible to operate with NRZ signal light of a wider bit rate than the conventional all-optical switch.
- variable delay circuit 11 and the variable attenuator 12 are provided between the 3 dB power bra 33 for distributing the input NRZ signal light 53 and the 3 dB power bra 34.
- the variable attenuator 13 is provided between the 3 dB coupler 33 and the 3 dB coupler 35.
- the variable delay circuit 11 is arranged such that, after one NRZ signal light distributed by the 3 dB coupler 33 enters the nonlinear waveguide element 1, the other NRZ signal light enters the nonlinear waveguide element 2 so that the other NRZ signal light enters the nonlinear waveguide element 2.
- This wavelength and the wavelength are both SOA gains.
- the nonlinear waveguide element 1 After being arranged, one is input to the nonlinear waveguide element 1 and the other is input to the nonlinear waveguide element 2, and the nonlinear waveguides 1 and 2 undergo a refractive index change (nonlinear phase shift). At that time, in the nonlinear waveguide elements 1 and 2, the CW light and the NRZ signal light propagate in opposite directions. Then, the CW light that has passed through the nonlinear waveguide elements 1 and 2 is multiplexed again by the 3 dB power blur 37 to become NRZ data modulated light, which is output from the port 38 as wavelength converted light.
- the CW of the wavelength ⁇ passing through the nonlinear waveguide element 1 is increased.
- the light undergoes a nonlinear phase shift and the wavelength from output port 38;
- the amount of nonlinear phase shift in the nonlinear waveguide element 1 is preferably at least about ⁇ / 2 before the time ⁇ elapses, and is more preferably close to ⁇ .
- the NRZ signal light having the wavelength ⁇ is also input to the nonlinear waveguide element 2, and the carrier density of the nonlinear waveguide element 2 decreases.
- the refractive index changes.
- CW light having a wavelength passing through the nonlinear waveguide element 2 also undergoes a nonlinear phase shift.
- the nonlinear phase shift in the waveguide element 2 has the same sign as the nonlinear phase shift generated in the nonlinear waveguide element 1 and is smaller than the nonlinear phase shift of the nonlinear waveguide element 1. As a result, it is possible to cancel the tail portion after the time ⁇ has elapsed since the nonlinear phase shift occurred in the nonlinear waveguide element 1. As a result, the optical output of the wavelength is turned off.
- the input of the NRZ signal light having the wavelength of I is changed from ON to OFF.
- this all-optical switch has a non-linear waveguide element 1 having an SOA and a phase adjuster 14 in one arm of the two arms in the Mach-Zehnder optical circuit described above.
- the other arm is provided with a nonlinear waveguide element 2 having an SOA and a phase adjuster 15.
- the nonlinear waveguide element 1 and the nonlinear waveguide element 2 are arranged so that the optical path lengths up to the force bra 43 are different from each other. Specifically, the optical path length from the force bra 43 to the nonlinear waveguide element 1 L
- the refractive index change (non-linear phase shift) force caused in the nonlinear waveguide element 1 is made asymmetrical in the distribution ratio in the force bra 43 so as to be larger than the refractive index change caused in the nonlinear waveguide element 2.
- the phase adjusters 14 and 15 in the all-optical switch according to the present embodiment are provided with N to prevent output light derived from the CW light 52 from being output from the output port 45 when the NRZ signal light 53 is not input.
- the phase difference when the CW light passing through both arms interferes with the coupler 43 is set to be a half wavelength.
- the configuration of the all-optical switch of this embodiment other than the above is the same as that of the all-optical switch of the above-described second embodiment.
- phase nonlinear waveguide element 1 After being distributed, one is input to the phase nonlinear waveguide element 1 via the phase adjuster 14, and the other is input to the phase nonlinear waveguide element 2 via the phase adjuster 15. Then, the phase nonlinear waveguide elements 1 and 2 undergo nonlinear phase shift. At this time, in the nonlinear waveguide elements 1 and 2, the CW light and the NRZ signal light propagate in opposite directions. Then, the CW light that has passed through the nonlinear waveguide elements 1 and 2 is recombined by the power blur 43 to become NRZ data modulated light, which is output from the output port 45 as wavelength converted light.
- the optical path length L from the force bra 43 to the nonlinear waveguide element 1 is shorter than the optical path length L from the force bra 43 to the nonlinear waveguide element 2;
- the all-optical switch of the present embodiment receives the NRZ signal light 53 having the wavelength and receives the NRZ output light having the wavelength ⁇ .
- the switching operation is realized.
- NRZ-RZ converted light can be output by inputting clock pulse light instead of CW light.
- the intensity of the signal light input to the nonlinear waveguide elements of both arms is changed.
- S ⁇ A is used as a nonlinear waveguide element
- the ratio between the phase shift and the gain change (alpha parameter ) Using different SOA, using S ⁇ A with different differential gain coefficient, using SOA with different injected current
- a method using an SOA having a different optical confinement coefficient can be applied.
- the Mach-Zehnder optical circuit having nonlinear waveguide elements in both arms in the all-optical switch according to the above-described first to sixth embodiments is a semiconductor nonlinear type that can be monolithically integrated on a semiconductor.
- a waveguide element may be hybrid-integrated with a planar optical circuit made of a material such as quartz. Further, it may be constituted by discrete optical components.
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
- Optical Communication System (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/568,984 US20070189662A1 (en) | 2003-08-21 | 2004-08-12 | All-optical switch |
EP04771572A EP1662307A4 (en) | 2003-08-21 | 2004-08-12 | COMPLETE LAMP SWITCH |
JP2005513270A JP4442565B2 (ja) | 2003-08-21 | 2004-08-12 | 全光スイッチ |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003297330 | 2003-08-21 | ||
JP2003-297330 | 2003-08-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005019922A1 true WO2005019922A1 (ja) | 2005-03-03 |
Family
ID=34213642
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/011597 WO2005019922A1 (ja) | 2003-08-21 | 2004-08-12 | 全光スイッチ |
Country Status (5)
Country | Link |
---|---|
US (1) | US20070189662A1 (ja) |
EP (1) | EP1662307A4 (ja) |
JP (1) | JP4442565B2 (ja) |
CN (1) | CN1836189A (ja) |
WO (1) | WO2005019922A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014089474A (ja) * | 2014-01-14 | 2014-05-15 | Nikon Corp | レーザ装置 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7433549B2 (en) * | 2006-09-20 | 2008-10-07 | Lucent Technologies Inc. | Optical modulator |
US8749874B2 (en) | 2009-03-10 | 2014-06-10 | Lockheed Martin Corporation | Optical integration system and method |
US10142711B2 (en) | 2015-04-14 | 2018-11-27 | International Business Machines Corporation | Low-crosstalk electro-optical Mach-Zehnder switch |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003506726A (ja) * | 1999-08-03 | 2003-02-18 | アルカテル | 光学式識別回路 |
JP2003057695A (ja) * | 2001-08-20 | 2003-02-26 | Nippon Telegr & Teleph Corp <Ntt> | 光制御素子 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2531443B2 (ja) * | 1993-07-02 | 1996-09-04 | 日本電気株式会社 | 全光素子 |
JP2720782B2 (ja) * | 1993-12-28 | 1998-03-04 | 日本電気株式会社 | 光変調方法 |
JP3391267B2 (ja) * | 1998-07-14 | 2003-03-31 | 日本電気株式会社 | 全光スイッチ及び波長変換器 |
-
2004
- 2004-08-12 US US10/568,984 patent/US20070189662A1/en not_active Abandoned
- 2004-08-12 EP EP04771572A patent/EP1662307A4/en not_active Withdrawn
- 2004-08-12 CN CNA2004800236964A patent/CN1836189A/zh active Pending
- 2004-08-12 JP JP2005513270A patent/JP4442565B2/ja active Active
- 2004-08-12 WO PCT/JP2004/011597 patent/WO2005019922A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003506726A (ja) * | 1999-08-03 | 2003-02-18 | アルカテル | 光学式識別回路 |
JP2003057695A (ja) * | 2001-08-20 | 2003-02-26 | Nippon Telegr & Teleph Corp <Ntt> | 光制御素子 |
Non-Patent Citations (1)
Title |
---|
NAKAMURA, S.: "Shinki Dosa Joken o Donyu shita Taisho Mach-Zender-gata Switch ni yoru Bit Rate Muizon NRZ Zenhikarihacho Henkan to Sono Shutsuryoku Hikari Denso Tokusei", THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS, vol. 104, no. 80, 27 May 2004 (2004-05-27), pages 5 - 10, XP002985780 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014089474A (ja) * | 2014-01-14 | 2014-05-15 | Nikon Corp | レーザ装置 |
Also Published As
Publication number | Publication date |
---|---|
JP4442565B2 (ja) | 2010-03-31 |
CN1836189A (zh) | 2006-09-20 |
JPWO2005019922A1 (ja) | 2007-10-04 |
EP1662307A4 (en) | 2007-11-07 |
US20070189662A1 (en) | 2007-08-16 |
EP1662307A1 (en) | 2006-05-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US11340480B2 (en) | Wavelength locking filter | |
EP0804751B1 (en) | Optical switch | |
de Valicourt et al. | Photonic integrated circuit based on hybrid III–V/silicon integration | |
JP2022516194A (ja) | マルチモード成分を有する偏光無依存型フォトニックデバイス | |
US6771847B2 (en) | Optical switch using multimode interferometer, and optical demultiplexer | |
EP1191387B1 (en) | Light-controlled light modulator | |
WO2016180146A1 (en) | Tunable wavelength-flattening element for switch carrying multiple wavelengths per lightpath | |
US7742702B2 (en) | Chirp switching circuit and optical transmission system | |
JP4863272B2 (ja) | 光フリップフロップ | |
WO2005019922A1 (ja) | 全光スイッチ | |
Campi et al. | Wavelength conversion technologies | |
US20040037524A1 (en) | Optical threshold devices and methods | |
JP3761412B2 (ja) | 多波長光源 | |
US7123401B2 (en) | All optical phase insensitive wavelength converters, apparatus systems and methods | |
JP4400716B2 (ja) | 全光スイッチおよび方法 | |
JP4242864B2 (ja) | 波長可変レーザ光源を自体で生成する波長変換器 | |
US7362928B2 (en) | Optical switch and gate apparatus and method | |
JP2004061889A (ja) | マッハツェンダー型全光スイッチ | |
JP2001188270A (ja) | 波長変換装置 | |
AU690797C (en) | Optical switch | |
JP3778827B2 (ja) | 光制御素子 | |
JP3546406B2 (ja) | 光制御素子 | |
JP5119492B2 (ja) | 光フリップフロップ | |
JP3778826B2 (ja) | 光制御素子 | |
JPH11231361A (ja) | 非線形ループミラー |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200480023696.4 Country of ref document: CN |
|
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: 2005513270 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2004771572 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 2004771572 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 10568984 Country of ref document: US Ref document number: 2007189662 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 10568984 Country of ref document: US |