WO2005114280A1 - 光合分波器 - Google Patents
光合分波器 Download PDFInfo
- Publication number
- WO2005114280A1 WO2005114280A1 PCT/JP2005/009130 JP2005009130W WO2005114280A1 WO 2005114280 A1 WO2005114280 A1 WO 2005114280A1 JP 2005009130 W JP2005009130 W JP 2005009130W WO 2005114280 A1 WO2005114280 A1 WO 2005114280A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- waveguide
- input
- mode
- output
- side connection
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/12007—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind forming wavelength selective elements, e.g. multiplexer, demultiplexer
- G02B6/12009—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind forming wavelength selective elements, e.g. multiplexer, demultiplexer comprising arrayed waveguide grating [AWG] devices, i.e. with a phased array of waveguides
- G02B6/12016—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind forming wavelength selective elements, e.g. multiplexer, demultiplexer comprising arrayed waveguide grating [AWG] devices, i.e. with a phased array of waveguides characterised by the input or output waveguides, e.g. tapered waveguide ends, coupled together pairs of output waveguides
Definitions
- the present invention relates to an optical wavelength multiplexer / demultiplexer capable of extracting only a desired channel in a wavelength division multiplexing (WDM) transmission system, and more particularly to an arrayed waveguide type diffraction grating (AWG).
- WDM wavelength division multiplexing
- AMG arrayed waveguide type diffraction grating
- An AWG is an optical functional device that is configured by connecting an input waveguide, an input coupler waveguide, a waveguide array, an output coupler waveguide, and an output waveguide in this order with the input side force also directed to the output side.
- AWGs can be manufactured in the same process and the same number of steps regardless of the number of channels, and in principle, there is no characteristic deterioration such as loss increase. It is used
- Fig. 1 is a characteristic diagram showing the band characteristics of the AWG, where the vertical axis indicates light intensity and the horizontal axis indicates wavelength.
- the band characteristics of an AWG have a Gaussian shape as shown in FIG. Therefore, if the wavelength of the light source fluctuates, the wavelength of the light from the light source also shifts in the AWG bandwidth, causing a problem that transmission loss increases.
- the overall band characteristic is a superposition of the band characteristics of each AWG, and the band characteristic is narrowed.
- the overall band characteristics are the same as the band characteristics of the first-stage AWG and the second-stage AWG. Become.
- Such narrowing of band characteristics due to the cascade connection makes it difficult to maintain a good transmission band.
- Figure 3 shows the band characteristics when two stages of AWGs with flat band characteristics are cascaded.
- the overall band characteristic is a superposition of the band characteristic of the first-stage AWG and the band characteristic of the second-stage AWG, but since each AWG has a flat band characteristic, The combined band characteristics also have flat characteristics.
- an AWG having a flat band characteristic as described above can be realized, demultiplexing and multiplexing at the repeater on the transmission path can be performed, so that an OADM (Optical Add Drop Multiplexing) as shown in Fig. 4 Applications such as opening up.
- the OADM shown in Fig. 4 is composed of a first AWG that multiplexes multiple input lights, a second AWG that splits the output light of the first AWG, and a part of the output light of the second AWG. And a fourth AWG that combines the output light of this third AWG into a plurality of output lights. .
- the remaining output light of the second AWG is provided externally as “drop” light.
- An optical element using quartz as a material forming the AWG has a temperature coefficient of about 0.01 nm / ° C.
- a method is employed in which the transmission wavelength is fixed while keeping the temperature of the element constant.
- a typical example is a method of controlling the center wavelength of an element by controlling the temperature of the element using a heater or the like.
- this method requires a power supply to drive the heaters, etc., and requires a technique for controlling the temperature with high precision and dynamic temperature.
- the band characteristics of the AWG are flat, even if the center wavelength of the device shifts slightly depending on the temperature, it can be prevented from affecting the transmission characteristics. For this reason, in an AWG having flat band characteristics, a wavelength control mechanism becomes unnecessary or the wavelength control mechanism can be simplified, so that the cost and power consumption of the communication system can be reduced. .
- FIGS. 5A and 5B are schematic diagrams showing a configuration of a connection portion of an input waveguide to a coupler waveguide, which has been conventionally employed to flatten the band characteristics of an AWG.
- 5A and 5B are regions where mode conversion of propagating light is performed.
- the input waveguide 11 is coupled to the coupler Connected to.
- the conventional example shown in FIG. 5B is called an MMI (Multi-mode Interference) system.
- an input waveguide 21 is connected to a coupler waveguide via a rectangular waveguide 22.
- the waveguide device it is important to reduce the size of the device in order to achieve low cost and high performance.
- it is effective to increase the relative refractive index difference ⁇ ( nl-n2) between the core (refractive index nl) and the cladding (refractive index n2) of the waveguide.
- ⁇ the relative refractive index difference between the core (refractive index nl) and the cladding (refractive index n2) of the waveguide.
- the relative refractive index difference ⁇ is increased, the confinement of light in the waveguide can be increased, so that each waveguide element such as the minimum bending radius of the bent waveguide can be reduced, and the element size can be reduced.
- connection waveguides (parabolic waveguide 12, rectangular waveguide 22) shown in FIGS.5A and 5B by utilizing the effect of light confinement. it can.
- the relative refractive index difference ⁇ 0.5%
- the input / output waveguide spacing at the connection with the coupler waveguide is required to be about 30 m, but the relative refractive index difference ⁇ is 1.5%.
- the distance between the input and output waveguides can be reduced to about 10 m.
- the spacing between the input and output waveguides and the length of the coupler waveguide are proportional to each other when the characteristics are the same. If possible, the coupler length can be reduced to 1/3. Therefore, reducing the distance between the input waveguides (and the distance between the output waveguides) is extremely important from the viewpoint of reducing the element size.
- the light intensity distribution at the end of the tapered waveguide is used. Needs to be changed to the optimum light intensity distribution for flattening, but it is difficult to make such a change in a small area of a small AWG. This is because a sufficient spatial frequency required for the mode conversion cannot be ensured because the waveguide width W of the nolaboric waveguide 12 is small. For this reason, when a parabolic tapered waveguide is used, the waveguide width W needs to be about the same as that of a conventional AWG, and as a result, the element size increases.
- the conventional technique of flattening the band characteristics of the AWG basically uses the coupling between the first-order mode and the zeroth-order mode, so that about 50% of the channel bandwidth in the ldB bandwidth is used. Until now, it was possible to flatten. This problem also arises with any conventional AWG planarization technique.
- An object of the present invention is to solve the above-described problems of the conventional technology.
- a first object of the present invention is to provide a band flattening AWG with improved tolerance to wavelength fluctuations and process fluctuations.
- a second object of the present invention is to realize a high- ⁇ miniaturized AWG having flattening characteristics without increasing the size of the band flattening AWG due to the high ⁇ .
- a third object of the present invention is to provide an AWG having a flat band exceeding 50% of the channel band so as to support CWDM.
- the first and second coupler waveguides have one end connected to the input waveguide, and the other end connected to the light input end face of the first coupler waveguide.
- One or more input connection waveguides connected, and one or more outputs connected at one end to the output waveguide and the other end connected to the optical output end face of the second coupler waveguide.
- the length of at least one of the output-side connection waveguides is set so that mode conversion and interference occur and the light intensity at the connection with the coupler waveguide becomes a minimum value or a value near the minimum value.
- the mode conversion waveguide includes a mode mixing region and a mode interference region.
- the center of the input or output waveguide in the light propagation direction is deviated from the center of the mode conversion waveguide in the light propagation direction.
- a light propagation direction of the input or output waveguide is inclined with respect to a light propagation direction of the mode conversion waveguide.
- the optical multiplexer / demultiplexer according to the present invention is configured such that a connection portion waveguide wider than the input / output waveguide is connected to each of the input / output force blur waveguides connected to the waveguide array.
- at least one of the input side / output side connection waveguides is composed of a mode conversion waveguide in which inter-mode mixing and interference occur, and the length of the mode conversion waveguide is the interference between the propagation modes.
- Has a length that is just stable! / By using the region where the light wave is stable, it is possible to realize an AWG with high manufacturing tolerance and strong resistance to wavelength fluctuation.
- the mode mixing is performed by generating abrupt wavefront fluctuation using steep waveguide structure change.
- the band characteristic can be flattened as it is.
- the structure of the present invention makes it possible to realize a band flattening AWG by combining higher-order modes. AWG can be realized.
- FIG. 1 is a graph showing characteristics of an AWG having a Gaussian band characteristic.
- FIG. 3 is a graph showing band characteristics obtained by connecting AWGs in cascade.
- FIG. 4 is a block diagram showing an application example of a flattening band characteristic AWG.
- FIG. 5A is a plan view showing an example of a conventional input side connection portion waveguide.
- FIG. 5B is a plan view showing another example of the conventional input-side connection waveguide.
- FIG. 6 is a plan view showing one embodiment of the present invention.
- FIG. 7 is an enlarged view of a part of a waveguide on an input side in FIG. 6;
- FIG. 8 is an enlarged view of a portion of an output side connection waveguide in FIG. 6.
- FIG. 9 is a partial cross-sectional view of one embodiment of the present invention.
- FIG. 10 is a graph showing the light intensity distribution at the coupling portion with the coupler waveguide when the mode mixing section length ⁇ of the mode conversion waveguide is changed, and a graph showing the overall band characteristic.
- FIG. 11 is a diagram showing a light intensity distribution in a mode conversion waveguide.
- FIG. 12A is a plan view showing a modified example of the mode interference section of the mode conversion waveguide according to one embodiment of the present invention.
- FIG. 12B is a plan view showing another modified example of the mode interference section of the mode conversion waveguide according to one embodiment of the present invention.
- FIG. 13 is a diagram for explaining an IdB bandwidth, a 3 dB bandwidth, and inter-channel isolation in an AWG band characteristic diagram.
- FIG. 14 A graph showing the IdB bandwidth of the AWG according to the embodiment, with the mode conversion waveguide width W and the tapered waveguide width W as parameters.
- FIG. 15 is a graph showing the 3 dB bandwidth of the AWG according to the embodiment, using the mode conversion waveguide width W and the tapered waveguide width W as parameters.
- FIG. 16 is a graph showing the excess loss of the AWG according to the embodiment using the mode conversion waveguide width W and the tapered waveguide width W as parameters.
- FIG. 17 is a graph showing AWG channel-to-channel isolation according to the embodiment, with the mode conversion waveguide width W and the tapered waveguide width W as parameters.
- FIG. 18 is a graph showing a light intensity distribution and a whole AWG band characteristic at a coupling portion between an input side connection waveguide and an output side connection waveguide and a coupler waveguide according to another embodiment of the present invention.
- FIG. 19A is a plan view showing an example of a mode conversion waveguide according to another embodiment of the present invention.
- FIG. 19B is a plan view showing another example of the mode conversion waveguide according to another embodiment of the present invention.
- FIG. 19C is a plan view showing another example of the mode conversion waveguide according to another embodiment of the present invention.
- FIG. 20 is a graph showing band characteristics of Example 1 of the present invention.
- FIG. 6 is a plan view showing an embodiment of the optical multiplexer / demultiplexer of the present invention.
- the optical multiplexer / demultiplexer according to the present embodiment transmits light having wavelengths of 1, ⁇ 2,.
- the input-side coupler waveguide 105 has a coupler waveguide length ⁇ .
- the input-side connection waveguide 103 is composed of a mode conversion waveguide 108 provided for each input optical waveguide 101 as shown in an enlarged view in FIG.
- the mode conversion waveguides 108 are arranged at an interval ⁇ , and have a width W on the input coupler waveguide 105 side.
- the output side connection portion waveguide 104 includes a tapered waveguide 109 provided for each output optical waveguide 102. Tapered waveguide 109 is spaced! ⁇ And have a width W on the output coupler waveguide 106 side.
- FIGS. 7 and 8 are diagrams showing the mode conversion waveguide 108 and the tapered waveguide 109 in further enlarged scale, respectively.
- the mode conversion waveguide 108 includes a mode mixing section 110 where mixing of the 0th-order mode light and the primary mode light is performed, and a mode interference section where interference between the mixed modes is performed. 111.
- the length ⁇ and the shape of the mode mixing section 110 are selected so that the mixing ratio between the 0th-order mode light and the 1st-order mode light is appropriately adjusted.
- the length L of the mode conversion waveguide 108 is set at a position where the light intensity becomes minimum due to interference.
- the tapered waveguide 109 has a gentle taper as shown in FIG. 8, and its width W is smaller than the mode conversion waveguide width W. Mode conversion is not performed in the tapered waveguide 109 because the tapered waveguide 109 has a tapered shape with a gentle inclination.
- a tapered waveguide may be arranged on the input side, and a mode conversion waveguide may be arranged on the output side.
- mode conversion waveguides may be arranged on both the input side and the output side.
- the optical multiplexer / demultiplexer according to the present embodiment shown in FIG. 6 is made of an AWG formed on a silicon substrate.
- FIG. 9 is a partial sectional view showing a sectional state of the mode conversion waveguide. Silicon base An SiO film 2 is formed on a plate 1, and a core layer constituting an optical waveguide is formed on the SiO film 2.
- the core layer 3 is made of SiON. Core layer 3 formed on SiO film 2
- SiO film 2 core
- the two layers 3 and the cladding layer 4 can be manufactured by using, for example, a flame deposition method or a CVD method.
- setting the relative refractive index difference ⁇ to 1.5% or more is referred to as noise ⁇ conversion.
- a waveguide having a relative refractive index difference ⁇ of 1.5% or more is referred to as a ⁇ waveguide.
- This AWG is configured with 40 channels and a demultiplexing interval of 0.8 nm (100 GHz, 1.55 m).
- the bending radius of the waveguide can be reduced. Specifically, when the relative refractive index difference ⁇ is 0.5%, the bending radius of the waveguide is about 8 mm, whereas when the relative refractive index difference ⁇ is 1.5%, the bending radius of the waveguide is Is about 2mm.
- the bending radius of the waveguide can be reduced, so that the chip size can be reduced from 1/5 to 1/10.
- mode conversion waveguide 108 is formed of mode mixing section 110 and mode interference section 111 having a sharp change in shape, even if high ⁇ waveguide is adopted, the width W of the mode conversion waveguide is reduced.
- Lightwave Circuit increases the ratio of light confined to the optical waveguide by increasing the ⁇ , so the waveguide pitch (“" ”and“ ⁇ '”in Fig. 6) is reduced to reduce the AWG size. Can be achieved.
- the waveguide pitch also determines the relative refractive index difference ⁇ force, and if they are too close to each other, light leaks to the adjacent waveguide, resulting in poor crosstalk (isolation) characteristics of light. .
- the isolation between adjacent channels is required to be 30dB or more, so setting the waveguide pitch is important.
- the waveguide interval P of the mode conversion waveguide 108 is proportional to the length ⁇ of the coupler waveguide 105, the length of the coupler can be shortened by high ⁇ ⁇ , and the size of the AWG can be reduced. . By reducing the size of the AWG, the device yield can be increased from 20 to 30 in the case of an 8-inch wafer.
- the light intensity distribution at the final end of the mode conversion waveguide 108 (coupling portion of the mode conversion waveguide 108 with the coupler waveguide 105) is adjusted to the center of the distribution. It is necessary to have a concave shape (see the shape in the upper center of the light intensity distribution in Fig. 10).
- the mode conversion waveguide 108 has a sufficiently wide width so that the light intensity distribution at the output portion of the mode conversion waveguide has a concave shape at the center. It is composed of two regions, ie, a mode mixing unit 110 for performing mode conversion up to the width 111. As a result, band flattening is realized in a compact AWG.
- the width W of the tapered waveguide on the output side is set to 8. O / zm, and the width W of the mode conversion waveguide on the input side is 12. O ⁇ m ,
- the interval P is 15.O ⁇ m, and the mode conversion waveguide length L is set to 110 m at the lowest point of the light intensity.
- Figure 10 shows the calculation results of the light intensity distribution and AWG band characteristics. In addition to selecting the mode mixing length appropriately, the mode conversion waveguide length L is set long so that the bottom of the interference appears multiple times, and the other conditions are the same as above.
- Fig. 11 shows the results of analyzing the light intensity distribution at with the ⁇ analysis method (Beam Propagation Method).
- the upper part shows the light intensity distribution at the coupling portion with the coupler waveguide
- the lower part shows the entire band characteristic.
- the light intensity distribution on the left and the light intensity distribution at the center in the upper part of Fig. 10 are for the mode mixing length X force of 20 ⁇ m and 45 ⁇ m, respectively.
- the light intensity distribution has two peaks, but the height of each peak (the depth of the valley) is different. This indicates that the mixing ratio of the 0th-order mode and the 1st-order mode changes depending on the mode mixing length ⁇ .
- the valley of the light intensity distribution deepens.
- the curve in the figure indicates an iso-intensity line
- the Rikoji portion indicates a region with low light intensity.
- the propagating light that has been concentrated in the central portion of the waveguide is diffracted and spread when entering the mode mixing unit 110, and at the same time, the first-order mode light is mixed with the zero-order mode light.
- the light propagates through the mode interference section 111 and the bottom of the light intensity (portion of the ⁇ - ⁇ line, the portion of the C-C line) and the top (portion of the ⁇ -) line) appear alternately due to the interference between the modes.
- the point where the light intensity takes a minimum value is determined as the final end of the mode conversion waveguide. Therefore, the position of the ⁇ - ⁇ line or the C-C line becomes a coupling portion with the coupler waveguide.
- the reason why the mode change waveguide length L is set at the position where the light intensity has the minimum value is V, because the differential value of the change in the traveling direction of the light intensity distribution at the portion where the light intensity shows the minimum value. Is zero, so that even if the refractive index, waveguide width, or waveguide length fluctuates during manufacturing, the change in the light intensity distribution is reduced, and good manufacturing tolerance is obtained.
- the length L of the mode conversion waveguide is determined by the width W of the waveguide and the refractive index of the waveguide material, and is given by the following equation.
- the shape of the mode interference unit 111 does not necessarily have to be a straight shape.For example, as shown in FIGS. 12A and 12B Such a waveform or a chevron shape may be used.
- the waveguide length L at which the coupling portion with the input-side coupler waveguide forms a valley of interference is defined as follows when the 0th-order and 1st-order mode light is used in the mode conversion region.
- ⁇ is a number indicating the order of the base of interference that appears periodically, and is 0 or a natural number.
- ⁇ is assumed that the propagation constant of all the mode conversion waveguides including the mode mixing section is constant.
- the above two equations are the following two equations, where the number of modes is N.
- Equation 4 In the case of the mode conversion waveguide shown in Fig. 7, since the mode conversion waveguide length L hardly changes even if the mode mixing length is changed, the mode conversion waveguide was determined based on the following equation (1).
- the band characteristics of an AWG with a mode conversion waveguide are evaluated.
- the characteristics of the AWG are evaluated based on the IdB bandwidth, 3dB bandwidth, and isolation with adjacent channels shown in Fig.13.
- the ldB (3dB) bandwidth drops from the light intensity at the center of the band to IdB (3dB).
- isolation is the intensity crosstalk from adjacent channels.
- the relative refractive index difference ⁇ of the waveguide is 1.5%
- the input and output waveguide spacings ⁇ and ⁇ are each 15 m
- the selectable parameters are the input waveguide width W and the output waveguide width.
- the mode conversion waveguide length L is determined as W, the mode mixing section length ⁇ .
- the length at which the band characteristics become flat is uniquely determined if the widths of both waveguides are determined.
- the parameters determine the shape of the mode conversion waveguide.
- the maximum value of the waveguide widths W and W ' is 14 ⁇ m.
- FIG. 14 is a graph created by plotting the ldB bandwidth when the input-side waveguide width W and the output-side waveguide width W are changed, and connecting the same bandwidth. Since the channel spacing in this case is 0.8 nm, an ldB bandwidth of 0.4 nm means that 50% of the channel bandwidth has ldB flatness. Here, when the flatness of 50% is targeted, good characteristics can be obtained in the lower right part of FIG.
- Figure 15 is a graph plotting the 3dB bandwidth and connecting the same bandwidth. In this case, if the target bandwidth is set to 75%, the bandwidth becomes 0.6 nm, so the right side of the graph satisfies the condition.
- FIG. 14 is a graph created by plotting the ldB bandwidth when the input-side waveguide width W and the output-side waveguide width W are changed, and connecting the same bandwidth. Since the channel spacing in this case is 0.8 nm, an ldB bandwidth of 0.4 nm means that 50% of the channel bandwidth has ldB flat
- FIG. 16 is a graph created by plotting excess losses (losses for obtaining flattening characteristics) and connecting the same loss points. From FIG. 16, it can be seen that the excess loss increases toward the lower right.
- FIG. 17 is a graph created by plotting isolation with adjacent channels and connecting the same isolation points. In Fig. 17, the area indicated by Rishiji has three areas where 50% of the ldB band, 75% of the 3dB band, and 30dB of isolation characteristics can be taken into account, and this area must be selected. Thus, an AWG having a flattened band and excellent isolation characteristics can be realized.
- FIG. 18 shows a mode conversion waveguide in which the 0th-order mode and the second-order mode are mixed in the input-side connection waveguide, and a taper in which the output-side connection waveguide does not undergo mode conversion.
- 6 is a graph showing the light intensity distribution at the coupling portion of each waveguide with the coupler waveguide and the overall band characteristics in the case of waveguides.
- FIGS. 19A to 19C show examples of a mode conversion waveguide that can mix 0th-order mode light and 2nd-order mode light.
- the center line of the input optical waveguide 101 in the light propagation direction is shifted from the center line force of the mode conversion waveguide 108 in the light propagation direction.
- the light propagation direction of the input optical waveguide 101 is inclined with respect to the light propagation direction of the mode conversion waveguide. Further, in the example shown in FIG.
- the light propagation direction of the input optical waveguide 101 is inclined with respect to the light propagation direction of the mode conversion waveguide 108, and the center line of the input optical waveguide 101 is also reduced in the center line force of the mode conversion waveguide 108. It is out of alignment.
- a 3 ⁇ m-thick SiO film was formed on a silicon substrate by thermal oxidation, and a CVD
- the input and output optical waveguide width is 4 m.
- the core layer was formed such that the mode mixing section length ⁇ was 45 nm, the mode conversion waveguide length L was 120 m, the width W was 13 / ⁇ , and the interval 15 was 15 m.
- the output side tapered waveguide has a waveguide length of 120 m, a width W force of ⁇ / z m, and a spacing! The force was 15 m, the coupler length was 2 mm, and the minimum radius of curvature in the waveguide array was 2 mm. After the formation of these waveguides, a 4 m-thick SiO film as a cladding layer is deposited thereon.
- FIG. 20 shows the characteristics for one channel. From FIG. 20, it can be seen that a 3 dB bandwidth of 0.6 nm or more and adjacent isolation of 30 dB have been achieved.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Integrated Circuits (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-150067 | 2004-05-20 | ||
JP2004150067A JP2007286077A (ja) | 2004-05-20 | 2004-05-20 | 光合分波器 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005114280A1 true WO2005114280A1 (ja) | 2005-12-01 |
Family
ID=35428504
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/009130 WO2005114280A1 (ja) | 2004-05-20 | 2005-05-19 | 光合分波器 |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP2007286077A (ja) |
WO (1) | WO2005114280A1 (ja) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006074016A (ja) * | 2004-08-02 | 2006-03-16 | Nippon Telegr & Teleph Corp <Ntt> | 光増幅型アレイ導波路回折格子 |
JP4960202B2 (ja) * | 2007-11-15 | 2012-06-27 | 日本電信電話株式会社 | 光波長合分波回路 |
JP4960201B2 (ja) * | 2007-11-15 | 2012-06-27 | 日本電信電話株式会社 | 光波長合分波回路 |
JP2009244163A (ja) * | 2008-03-31 | 2009-10-22 | Nippon Telegr & Teleph Corp <Ntt> | 光信号対雑音比を測定する装置および方法 |
JP5086196B2 (ja) * | 2008-07-22 | 2012-11-28 | 日本電信電話株式会社 | 光波長合分波回路 |
KR102364302B1 (ko) * | 2015-01-27 | 2022-02-21 | 한국전자통신연구원 | 평탄한 모드 발생 장치 및 이를 구비하는 배열 도파로 격자 |
JP7087547B2 (ja) * | 2018-03-28 | 2022-06-21 | 沖電気工業株式会社 | 光センサ装置 |
CN112327409B (zh) * | 2020-11-19 | 2021-09-07 | 西南交通大学 | 一种低串扰的硅基阵列波导光栅 |
CN114740568A (zh) | 2021-01-08 | 2022-07-12 | 华为技术有限公司 | 阵列波导光栅及其制造方法、收发机及光通信系统 |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5629992A (en) * | 1995-09-14 | 1997-05-13 | Bell Communications Research, Inc. | Passband flattening of integrated optical filters |
US6195482B1 (en) * | 1998-12-29 | 2001-02-27 | Lucent Technologies Inc. | Waveguide grating router |
JP2002090561A (ja) * | 2000-09-13 | 2002-03-27 | Sumitomo Electric Ind Ltd | 光合分波器 |
US6374013B1 (en) * | 1999-12-23 | 2002-04-16 | Nortel Networks Limited | Optical arrayed waveguide grating devices |
JP2002311264A (ja) * | 2001-04-16 | 2002-10-23 | Nec Corp | アレイ導波路格子、アレイ導波路格子モジュールおよび光通信システム |
US20020176665A1 (en) * | 2001-05-21 | 2002-11-28 | Mark Missey | Controlling the dispersion and passband characteristics of an arrayed waveguide grating |
JP2003513330A (ja) * | 1999-11-01 | 2003-04-08 | アルカテル・オプトロニクス・ユー・ケイ・リミテツド | 通過帯域平滑化フェーズドアレイ |
JP2004212435A (ja) * | 2002-12-27 | 2004-07-29 | Nippon Telegr & Teleph Corp <Ntt> | アレイ導波路格子型光合分波回路 |
JP2004212886A (ja) * | 2003-01-08 | 2004-07-29 | Nippon Telegr & Teleph Corp <Ntt> | 低分散アレイ導波路回折格子型光合分波回路 |
-
2004
- 2004-05-20 JP JP2004150067A patent/JP2007286077A/ja active Pending
-
2005
- 2005-05-19 WO PCT/JP2005/009130 patent/WO2005114280A1/ja active Application Filing
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5629992A (en) * | 1995-09-14 | 1997-05-13 | Bell Communications Research, Inc. | Passband flattening of integrated optical filters |
US6195482B1 (en) * | 1998-12-29 | 2001-02-27 | Lucent Technologies Inc. | Waveguide grating router |
JP2003513330A (ja) * | 1999-11-01 | 2003-04-08 | アルカテル・オプトロニクス・ユー・ケイ・リミテツド | 通過帯域平滑化フェーズドアレイ |
US6374013B1 (en) * | 1999-12-23 | 2002-04-16 | Nortel Networks Limited | Optical arrayed waveguide grating devices |
JP2002090561A (ja) * | 2000-09-13 | 2002-03-27 | Sumitomo Electric Ind Ltd | 光合分波器 |
JP2002311264A (ja) * | 2001-04-16 | 2002-10-23 | Nec Corp | アレイ導波路格子、アレイ導波路格子モジュールおよび光通信システム |
US20020176665A1 (en) * | 2001-05-21 | 2002-11-28 | Mark Missey | Controlling the dispersion and passband characteristics of an arrayed waveguide grating |
JP2004212435A (ja) * | 2002-12-27 | 2004-07-29 | Nippon Telegr & Teleph Corp <Ntt> | アレイ導波路格子型光合分波回路 |
JP2004212886A (ja) * | 2003-01-08 | 2004-07-29 | Nippon Telegr & Teleph Corp <Ntt> | 低分散アレイ導波路回折格子型光合分波回路 |
Non-Patent Citations (4)
Title |
---|
DAI D. ET AL.: "Optimal Design of an MMI Coupler for Broadening the Spectral Responce of an AW Demultiplexer.", JOURNAL OF LIGHTWAVE TECHNOLOGY., vol. 20, no. 11, November 2002 (2002-11-01), pages 1957 - 1961, XP001230562 * |
KITOH T. ET AL.: "Low chromatic-dispersion flat-top arrayed waveguide grating filter.", ELECTRONICS LETTERS., vol. 39, no. 15, 24 July 2003 (2003-07-24), pages 1116 - 1118, XP006020696 * |
OKAMOTO K. AND SUGITA A.ET AL.: "Flat spectral response arrayed-waveguide grating multiplexer with parabolic waveguide horns.", ELECTRONICS LETTERS, vol. 32, no. 18, 29 August 1996 (1996-08-29), pages 1661 - 1662, XP000637817 * |
SHIMODA T. ET AL.: "A Low-Loss, Compact Wide-FSR-AWG Using SiON Planar Lightwave Circuit Rechnology.", OPTICAL FIBER COMMUNICATION CONFERENCE 2003. OFC 2003., vol. 2, 23 March 2003 (2003-03-23), pages 703, XP010680444 * |
Also Published As
Publication number | Publication date |
---|---|
JP2007286077A (ja) | 2007-11-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2005114280A1 (ja) | 光合分波器 | |
JP4361030B2 (ja) | モードスプリッタおよび光回路 | |
JP4385224B2 (ja) | 光導波路デバイス及び光導波路モジュール | |
US7555175B2 (en) | Arrayed waveguide grating optical multiplexer/demultiplexer | |
US20060222296A1 (en) | Optical wavelength division multiplexer | |
WO2000011508A1 (en) | Array waveguide diffraction grating optical multiplexer/demultiplexer | |
JP3842804B2 (ja) | デュアルバンド波長分割多重化器 | |
US20020181857A1 (en) | Optical wavelength multiplexer/demultiplexer | |
JP2000171661A (ja) | アレイ導波路回折格子型光合分波器 | |
JP2002323626A (ja) | 光波長合分波器および光合分波システム | |
US6798952B2 (en) | Optical multiplexer/demultiplexer | |
JP3448518B2 (ja) | アレイ導波路回折格子 | |
JP2011180421A (ja) | 光合分波素子 | |
JPH11133253A (ja) | アレイ導波路型波長合分波器 | |
Oguma et al. | Flat-top and low-loss WDM filter composed of lattice-form interleave filter and arrayed-waveguide gratings on one chip | |
JP4273020B2 (ja) | 光導波路型波長フィルタおよび波長合分波器 | |
JPH112733A (ja) | アレイ格子型光合分波器 | |
JP3857906B2 (ja) | 光波長合分波器 | |
KR100594041B1 (ko) | 비대칭 도파로열 격자 | |
CN114488406A (zh) | 基于多模干涉原理的紧凑型波长复用器 | |
JP4375256B2 (ja) | 導波路型温度無依存光合分波器 | |
JP2002372639A (ja) | 光合分波器 | |
JP3797483B2 (ja) | アレイ型導波路格子 | |
JP3832741B2 (ja) | 波長タップ回路 | |
US7010197B2 (en) | Integrateable band filter using waveguide grating routers |
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 KM KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NG NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM 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): 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 IS IT LT 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 | ||
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWW | Wipo information: withdrawn in national office |
Country of ref document: DE |
|
122 | Ep: pct application non-entry in european phase | ||
NENP | Non-entry into the national phase |
Ref country code: JP |