# US 2010/0166366 A1 · Sealed beam coupler for an isolated environment > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0166366 A1 - Document ID: US20100166366A1 - Status: Published application - Kind: A1 - Application number: 12/396,536 - Filed: 2009-03-03 - Published: 2010-07-01 - Earliest claimed: 2008-12-31 - Assignees: Ipg Photonics Corporation - Inventors: Yuri Grapov; William D. Jones; Michael M. Digiantommaso - Web page: https://patentgrep.com/patent/US20100166366A1 ## CPC - G02B 6/32: having lens focusing means {positioned between opposed fibre ends (with lens being an integral part of the single fibre end G02B6/262)} - G02B 6/3814: {with cooling or heat dissipation means} - G02B 6/3813: {for transmission of high energy beam (coupling high energy sources and light guides G02B6/4296)} - G02B 6/4226: {Positioning means for moving the elements into alignment, e.g. alignment screws, deformation of the mount} - G02B 6/4248: {Feed-through connections for the hermetical passage of fibres through a package wall (see provisionally also G02B6/4428)} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A beam coupler assembly for a fiber laser is disclosed. The assembly includes a housing having a sidewall with an interior surface, an exterior surface, a first end and a second end. A first seal extending from the interior surface of the tubular housing and dividing the housing into a first section and a second section is also provided. The first section and second section are environmentally isolated from one another. However, the first seal is substantially optically neutral. An input collimator unit received within the first end of the sidewall of the housing and into the first section and is releasably coupled thereto. An output collimator unit received within the second end of the sidewall of the housing and into the second section and is also releasably coupled thereto. ## Claims ### Claim 1 A beam coupler assembly for a fiber laser, comprising: a housing having a sidewall with an interior surface, an exterior surface, a first end and a second end; a first seal extending from the interior surface of the housing and dividing the housing into a first section and a second section, the first section and second section being environmentally isolated from one another, the first seal being substantially optically neutral; an input collimator unit received within the first end of the sidewall of the housing and into the first section and releasably coupled thereto; and an output collimator unit received within the second end of the sidewall of the housing and into the second section and rcleasably coupled thereto; a flange extending from the exterior surface of the sidewall of the housing; and a shroud coupled to said flange and enclosing said output collimator unit, the shroud including a plurality of closable apertures therethrough. ### Claim 2 (depends on 1) The assembly of claim 1, further comprising a second seal adjacent to said first seal, the second seal providing a redundant seal to said first seal, the second seal being substantially optically neutral. ### Claim 3 (depends on 2) The assembly of claim 2, further comprising means for air pressure equalization between said first seal and said second seal. ### Claim 4 (depends on 3) The assembly of claim 3, wherein said means for air pressure equalization is a valve. ### Claim 5 (depends on 3) The assembly of claim 3, wherein said means for air pressure equalization is a set screw. ### Claim at position 6 6-7. (canceled) ### Claim 8 (depends on 1) The assembly of claim 1, wherein said shroud is positively pressurized. ### Claim 9 (depends on 1) The assembly of claim 1, further comprising an alignment mechanism configured and arranged to optically align the input collimator unit and the output collimator unit about a common optical axis ### Claim 10 (depends on 1) The assembly of claim 1, further comprising a plurality of connectors and tubes configured and arranged to circulate fluid coolant to and from said input collimator and said output collimator, respectively. ### Claim 11 A beam coupler assembly for a fiber laser for an isolated environment having an exterior wall defining an interior portion and an exterior portion and an aperture therethrough, said coupler assembly comprising: a housing having a sidewall with an interior surface, an exterior surface, a first end and a second end; a first seal extending from the interior surface of the housing and dividing the housing into a first section and a second section, the first section and second section being environmentally isolated from one another, said first seal being substantially optically neutral; a second seal adjacent to said first seal, the second seal extending from the interior surface of the tubular housing and providing a redundant seal to environmentally isolate the first section from the second section, the second seal being substantially optically neutrat an input collimator unit received within the first end of the sidewall of the housing and into the first section and releasably coupled thereto; an output collimator unit received within the second end of the sidewall of the housing and into the second section and releasably coupled thereto; a flange extending from the exterior surface of the sidewall of the housing and configured and arranged to mount to the aperture on the exterior wall whereby the output collimator unit is within the interior portion of the isolated environment and the input collimator unit is within the exterior portion of the isolated environment, and a shroud coupled to said flange and enclosing said output collimator unit, the shroud including a plurality of closable apertures therethrough. ### Claim 12 (depends on 11) The assembly of claim 11, further comprising means for air pressure equalization between said first seal and said second seal. ### Claim 13 (depends on 12) The assembly of claim 12, wherein said means for air pressure equalization is a valve. ### Claim 14 (depends on 12) The assembly of claim 12, wherein said means for air pressure equalization is a set screw. ### Claim 15 (canceled) ### Claim 16 (depends on 11) The assembly of claim 11, wherein said shroud is positively pressurized. ### Claim 17 (depends on 11) The assembly of claim 11, further comprising an alignment mechanism configured and arranged to optically align the input collimator unit and the output collimator unit about a common optical axis ### Claim 18 (depends on 11) The assembly of claim 11, further comprising a plurality of connectors and tubes configured and arranged to circulate fluid coolant to and from said input collimator and said output collimator, respectively. ### Claim at position 18 19-20. (canceled)