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1. 发明专利

CA3023857C OPTICAL MODULE 未知
公开(公告)号：CA3023857C
公开(公告)日：2021-07-13
申请号：CA3023857
申请日：2017-05-12
申请人： NTT ELECTRONICS CORP , NIPPON TELEGRAPH & TELEPHONE
发明人： NAKANISHI TOMOHIRO , SATO TERUAKI , ISHII MOTOHAYA , KONNO SATORU , SUZUKI YUICHI , NAGASHIMA SHIGEO , MINO SHINJI , ASAKAWA SHUICHIRO , FUKUDA HIROSHI , KAMEI SHIN , SOMA SHUNICHI , TSUZUKI KEN , USUI MITSUO , SAIDA TAKASHI
IPC分类号： G02B6/122 , G02B6/30
摘要： The present invention provides an optical module which is connectable to an optical fiber array and which can be packaged in a high density. Two 30 mm square package modules(102, 105) are mounted on a board(101), and optical waveguides in a 20 mm square Si photonic lightwave circuit(103) mounted on the package module(102) are connected to an optical fiber array(106) fixed to an optical fiber block (15 x10 mm)(104). Output end surfaces of the optical waveguides are perpendicular to a mount surface of the package module(102). The optical waveguides in the Si photonic lightwave circuit(103) may be tilted at, for example, 20 degrees with respect to a direction perpendicular to a right end surface. The optical fiber block(104) fixes optical fibers with the optical fibers tilted at 20 degrees with respect to a direction perpendicular to an end surface connected to the Si photonic lightwave circuit(103).

2. 发明专利

SG11201804105RA SILICON OPTICAL CIRCUIT 未知
公开(公告)号：SG11201804105RA
公开(公告)日：2018-06-28
申请号：SG11201804105R
申请日：2016-11-17
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KAMEI SHIN , JIZODO MAKOTO , TAKEDA KOTARO , FUKUDA HIROSHI
IPC分类号： G02B6/13 , G02B6/122 , G02B6/124 , G02B6/125
摘要： SILICON OPTICAL CIRCUIT The visual detection of a silicon optical circuit in a conventional technique depends on sensory decision by a human who visually conducts checking, and there has been limitation in completely detecting small flaws. A defective chip having a flaw which was overlooked in visual inspection is judged as a good product by mistake and is flowed out to the downstream processes after the visual inspection. The defective chip cannot be judged as a failure in an early stage of the process of the whole optical circuits, thereby reducing a yield at the downstream manufacturing and inspection processes and inducing increase in cost for manufacturing and inspecting products. The optical circuit of the present invention includes, in addition to an optical circuit that implements desired functions, an optical waveguide for flaw detection which surrounds the entire optical circuit and which is sufficiently proximate to the optical waveguide of the optical circuit and grating couplers connected to the optical waveguide for detection. Based on the transmission characteristic measurement of the optical waveguide for detection using the grating couplers, a flaw within each chip can be efficiently discovered in the state of a wafer before being cut into chips. A flaw can also be discovered hierarchically by providing individual optical waveguides for detection for respective chips and by further forming one common optical waveguide for detection over the plurality of chips. (Figure 1)

3. 发明专利

CA3028361A1 OPTICAL RECEIVER 未知
公开(公告)号：CA3028361A1
公开(公告)日：2017-12-28
申请号：CA3028361
申请日：2017-06-19
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： ITOH TOSHIHIRO , KAWAMURA YURIKO , KIKUCHI KIYOFUMI , TSUZUKI KEN , FUKUDA HIROSHI , KAMEI SHIN
IPC分类号： H04B10/61 , H01L31/02 , H04B10/69
摘要： An optical receiver constituted in an optical transmitter-receiver in such a way that the optical receiver is not affected by noise as much as possible even when a high noise occurs in the inside. An optical receiver characterized by having a connection part that connects two photodiodes (PD) of a dual photodiode configuration and a transimpedance amplifier (TIA), the connection part being such that a signal line from the dual photodiode is enclosed, respectively for each channel, by conductive patterns which are not connected to the signal line, and these conductive patterns are connected to a ground pattern of the transimpedance amplifier or a power supply pattern for the PD.

4. 发明专利

CA3005704A1 SILICON OPTICAL CIRCUIT 未知
公开(公告)号：CA3005704A1
公开(公告)日：2017-05-26
申请号：CA3005704
申请日：2016-11-17
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KAMEI SHIN , JIZODO MAKOTO , TAKEDA KOTARO , FUKUDA HIROSHI
IPC分类号： G02B6/13 , G02B6/122 , G02B6/124 , G02B6/125
摘要： The visual detection of a silicon optical circuit in the prior art depended on the sensory judgment of a human being to visually recognize, and there were limits to completely performing the detection of small scratches. A defective chip having scratches overlooked by visual inspection is mistakenly judged as passing and flows outs to a step downstream from the visual inspection. Unable to judge the defective chip as failing at the stage of an early step of the overall optical circuit, yield was lowered in downstream production and inspection steps, and production inspection costs for products increased. This optical circuit, in addition to an optical circuit that achieves a desired function, includes a detection optical waveguide for scratches sufficiently close to an optical waveguide of the optical circuit that surrounds the entire optical circuit, and a grating coupler connected to the detection optical waveguide. It is possible to efficiently discover scratches within each chip in a wafer state prior to being cut into chips, on the basis of the measurement of transmission characteristics of the detection optical waveguide using the grating coupler. It is also possible to discover scratches hierarchically by providing an individual detection waveguide for each chip and further forming one common detection optical waveguide over a plurality of chips.

5. 发明专利

CA2993930A1 OPTICAL MODULE 未知
公开(公告)号：CA2993930A1
公开(公告)日：2017-02-02
申请号：CA2993930
申请日：2016-07-27
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KIKUCHI KIYOFUMI , FUKUDA HIROSHI , SAIDA TAKASHI , KAMEI SHIN , TSUZUKI KEN
IPC分类号： H01S5/022
摘要： Provided is an optical module that suppresses crosstalk between high frequency transmission lines. The optical module of the present invention is provided with at least one set of: an optical port; an optical processing circuit optically connected to the optical port; an electrical/optical conversion element optically connected to the optical processing circuit; two or more high frequency transmission lines connected to the electrical/optical conversion element; and an electric port connected to the high frequency transmission lines. The optical module is provided with an electrically conductive cover block which is disposed on the high frequency transmission lines so as to cover at least a part of the high frequency transmission lines, and which is grounded.

6. 发明专利

DE3380833D1 DIGITAL DATA CODE CONVERSION CIRCUIT FOR VARIABLE-WORD-LENGTH DATA CODE 未知
公开(公告)号：DE3380833D1
公开(公告)日：1989-12-14
申请号：DE3380833
申请日：1983-06-28
申请人： NIPPON TELEGRAPH & TELEPHONE , FUJITSU LTD
发明人： KURODA HIDEO , HONMA TOSHIHIRO , MUKAWA NAOKI , FUKUDA HIROSHI , MATSUDA KIICHI
IPC分类号： G11B20/10 , G11B20/14 , H03M7/42 , G11B5/09 , H04L25/49 , H03M7/40 , H04N1/419
摘要： @ A digital data code conversion circuit for a variable-word-length data code comprises a data code conversion portion (4) and a preparation circuit (3) wherein a variable-word-length data code having a word length greater than a number of n bits is divided into a plurality of variable-word-length data codes having a word length less than or equal to the number of n bits in the preparation circuit (3) and the divided variable-word-length data codes are converted into fixed-ward-length data codes having a word length n in the data code conversion portion (4).

7. 发明专利

CA2982554C POLARIZATION MULTIPLEXING OPTICAL TRANSMISSION CIRCUIT AND POLARIZATION MULTIPLEXING OPTICAL TRANSMISSION AND RECEPTION CIRCUIT 未知
公开(公告)号：CA2982554C
公开(公告)日：2021-12-14
申请号：CA2982554
申请日：2016-04-12
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KAMEI SHIN , FUKUDA HIROSHI , JIZODO MAKOTO , KIKUCHI KIYOFUMI , TSUZUKI KEN
IPC分类号： H04J14/06 , H04B10/532 , H04J14/04
摘要： The present invention provides digital coherent polarization multiplexing optical transmission/reception circuits integrated into a single chip, in which disproportion in losses due to a polarization path is compensated for by optimally distributing transmission/reception optical power using an optical power splitter in which the asymmetry of a branching fraction is small. Polarization multiplexing optical transmission/reception circuits including a polarization multiplexing optical transmission circuit configured from a first optical power splitter for branching the optical power of continuous light outputted from a light source, one polarization optical modulation circuit on a larger loss path side connected to the one output of the first optical power splitter, a second optical power splitter connected to the other output of the first optical power splitter, and the other polarization optical modulation circuit connected to the one output of the second optical power splitter.

8. 发明专利

CA2989981C SOLDER JOINT STRUCTURE OF FLEXIBLE PRINTED CIRCUIT BOARD 未知
公开(公告)号：CA2989981C
公开(公告)日：2021-03-09
申请号：CA2989981
申请日：2016-06-17
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： USUI MITSUO , KIKUCHI KIYOFUMI , TSUZUKI KEN , FUKUDA HIROSHI , ASAKAWA SHUICHIRO , KAMEI SHIN , SOMA SHUNICHI , SAIDA TAKASHI
IPC分类号： H05K1/14 , H05K1/11 , H05K3/36
摘要： In a conventional soldering method, an FPC-side electrode pad and a package-side electrode pad are closely joined together with a solder layer, and the soldered state after a joining process has not been easily confirmed visually. The present invention provides a solder joint structure including a side face electrode which is formed on each of the side faces of the end parts of an FPC board and a package or PCB board that are to be soldered, extending vertically relative to the faces constituting each of electrode pads on the boards, and which introduces solder. On the side face electrodes of the board end parts, a part of solder that is formed continuously from the solder joint portion is visible and the state of the solder joint between the electrode pads on the two boards can be confirmed. The efficiency of solder joint tests can be improved.

9. 发明专利

CA3005704C SILICON OPTICAL CIRCUIT FOR DETECTING FLAWS IN AN OPTICAL CIRCUIT ELEMENT BASED ON LIGHT TRANSMITTANCE CHARACTERISTICS 未知
公开(公告)号：CA3005704C
公开(公告)日：2020-12-01
申请号：CA3005704
申请日：2016-11-17
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： KAMEI SHIN , JIZODO MAKOTO , TAKEDA KOTARO , FUKUDA HIROSHI
IPC分类号： G02B6/13 , G02B6/122 , G02B6/124 , G02B6/125
摘要： The visual detection of a silicon optical circuit in the prior art depended on the sensory judgment of a human being to visually recognize, and there were limits to completely performing the detection of small scratches. A defective chip having scratches overlooked by visual inspection is mistakenly judged as passing and flows outs to a step downstream from the visual inspection. Unable to judge the defective chip as failing at the stage of an early step of the overall optical circuit, yield was lowered in downstream production and inspection steps, and production inspection costs for products increased. This optical circuit, in addition to an optical circuit that achieves a desired function, includes a detection optical waveguide for scratches sufficiently close to an optical waveguide of the optical circuit that surrounds the entire optical circuit, and a grating coupler connected to the detection optical waveguide. It is possible to efficiently discover scratches within each chip in a wafer state prior to being cut into chips, on the basis of the measurement of transmission characteristics of the detection optical waveguide using the grating coupler. It is also possible to discover scratches hierarchically by providing an individual detection waveguide for each chip and further forming one common detection optical waveguide over a plurality of chips.

10. 发明专利

CA2995668C PHOTODETECTOR USING GERMANIUM ON A SILICON SUBSTRATE 未知
公开(公告)号：CA2995668C
公开(公告)日：2020-12-01
申请号：CA2995668
申请日：2016-08-26
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： FUKUDA HIROSHI , KAMEI SHIN , TSUZUKI KEN , JIZODO MAKOTO , KIKUCHI KIYOFUMI
IPC分类号： H01L31/10
摘要： The present invention provides a germanium photodetector which reduces a dark current without degradation of a photocurrent. The germanium photodetector includes: a silicon substrate; a lower clad layer formed on the silicon substrate; a core layer formed on the lower clad layer; a p-type silicon slab formed in a part of the core layer and doped with a p-type impurity ion; p++ silicon electrode sections that are highly-doped with a p-type impurity and act as an electrode; and germanium layers which absorb light. The germanium photodetector further includes an upper clad layer, an n-type germanium region doped with an n-type impurity above the germanium layer, and an electrode. According to the present invention, two germanium layers are provided on the p-type silicon slab so as to miniaturize the area of the surface of the individual germanium layer in contact with the p-type silicon slab , so that the dark current due to threading dislocation can be reduced.

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