# US 10,120,209 B2 · Optical transmission device and optical module > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,120,209 B2 - Document ID: US10120209B2 - Status: Granted - Kind: B2 - Application number: 15/244,438 - Filed: 2016-08-23 - Published: 2017-03-23 - Granted: 2018-11-06 - Earliest claimed: 2015-09-18 - Assignees: Fujitsu Optical Components Limited - Applicants: Fujitsu Optical Components Limited - Inventors: Masaki Sugiyama - Web page: https://patentgrep.com/patent/US10120209B2 ## CPC - G02F 1/0121: {Operation of devices; Circuit arrangements, not otherwise provided for in this subclass} - G02F 1/025: in an optical waveguide structure (G02F1/017, {G02F1/2257} take precedence) - H04B 10/505: {using external modulation} - H05K 1/189: characterised by the use of flexible or folded printed circuits - G02F 2201/12: electrode - H05K 2201/09145: Edge details - 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 - H04B: TRANSMISSION - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract An optical transmission device includes: an optical modulation package that includes a plurality of terminals that are exposed to an outside from a front surface thereof, and performs optical modulation on electrical signals input from the terminals; a flexible board that includes: an electrode arrangement part on which electrodes respectively connected to the terminals are arranged side by side to transmit the electrical signals to the terminals; and an arm part that projects more outward than an electrode located on an end of the electrode arrangement part and extends toward the optical modulation package to be locked to the optical modulation package; and an optical transmission member that transmits an optical signal obtained by the optical modulation performed by the optical modulation package. ## Claims ### Claim 1 An optical transmission device comprising: an optical modulation package that includes a plurality of terminals that are exposed to an outside from a front surface thereof and projecting portions that bulge out laterally from a side surfaces thereof, and performs optical modulation on electrical signals input from the terminals; a flexible board that includes: an electrode arrangement part on which electrodes respectively connected to the terminals are arranged side by side to transmit the electrical signals to the terminals; and a pair of arm parts that project more outward than an electrode located on an end of the electrode arrangement part and extend along the side surfaces of the optical modulation package to sandwich the optical modulation package, each of the arm parts including a concave part to be hooked to one of the projecting portions of the optical modulation package; and an optical transmission member that transmits an optical signal obtained by the optical modulation performed by the optical modulation package. ### Claim 2 (depends on 1) The optical transmission device according to claim 1, wherein each of the arm parts further includes a through-hole that penetrates the arm part from one surface to another surface thereof. ### Claim 3 (depends on 2) The optical transmission device according to claim 2, wherein the optical modulation package includes a lead that projects on a lateral side thereof, and at least one of the arm parts is connected to the optical modulation package by inserting the lead into the through-hole. ### Claim 4 (depends on 3) The optical transmission device according to claim 3, wherein at least one of the arm parts is soldered to the lead at the through-hole. ### Claim 5 (depends on 1) The optical transmission device according to claim 1, wherein the optical modulation package includes: an optical modulator that performs optical modulation on the electrical signals corresponding to a plurality of channels; a plurality of first terminals that are exposed to the outside, and have ground voltage; and a plurality of second terminals that are exposed to the outside between the first terminals, and corresponds to the electrical signals that are subjected to the optical modulation by the optical modulator. ### Claim 6 An optical transmission device comprising: an optical transmission member that transmits an optical signal; an optical receiver package that includes a plurality of terminals that are exposed to an outside from a front surface thereof and projecting portions that bulge out laterally from a side surfaces thereof, receives the optical signal transmitted through the optical transmission member to convert the optical signal into electrical signals, and outputs the electrical signals from the terminals; and a flexible board that includes: an electrode arrangement part on which electrodes respectively connected to the terminals are arranged side by side to transmit the electrical signals from the terminals; and a pair of arm parts that project more outward than an electrode located on an end of the electrode arrangement part and extend along the side surfaces of the optical receiver package to sandwich the optical receiver package, each of the arm parts including a concave part to be hooked to one of the projecting portions of the optical receiver package. ### Claim 7 An optical module comprising: an optical modulation package that includes a plurality of terminals that are exposed to an outside from a front surface thereof and projecting portions that bulge out laterally from side surfaces thereof, and performs optical modulation on electrical signals input from the terminals; a flexible board that includes: an electrode arrangement part on which electrodes respectively connected to the terminals are arranged side by side to transmit the electrical signals to the terminals; and a pair of arm parts that project more outward than an electrode located on an end of the electrode arrangement part and extend along side surfaces of the optical modulation package to sandwich the optical modulation package, each of the arm parts including a concave part to be hooked to one of the projecting portions of the optical modulation package.