Invention Grant
- Patent Title: Large mode area optical fiber
- Patent Title (中): 大模光区域光纤
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Application No.: US12669664Application Date: 2008-07-16
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Publication No.: US08797642B2Publication Date: 2014-08-05
- Inventor: Xin Chen , Joohyun Koh , Ming-Jun Li , Anping Liu
- Applicant: Xin Chen , Joohyun Koh , Ming-Jun Li , Anping Liu
- Applicant Address: US NY Corning
- Assignee: Corning Incorporated
- Current Assignee: Corning Incorporated
- Current Assignee Address: US NY Corning
- Agent Svetlana Short
- International Application: PCT/US2008/008689 WO 20080716
- International Announcement: WO2009/014623 WO 20090129
- Main IPC: G02B6/036
- IPC: G02B6/036 ; H04B10/17

Abstract:
A large-mode-area (LMA) optical fiber (10) that operates as a single-mode optical fiber. The optical fiber includes a core region (20) surrounded by an inner cladding (32), which in turn is surrounded by an outer cladding (40). The inner cladding includes at least one up-doped ring region (32R1). The ring region is configured to form a large attenuation differential between the higher-order modes and the fundamental mode so only that the fundamental mode remains traveling in the optical fiber. If necessary, the optical fiber can include a bend (10B) having a select “resonant” bend diameter (DB) that increases the relative attenuation of the fundamental and higher-order modes. The optical fiber supports an effective mode field diameter (MFD) of up to 40 μm to 50 μm. As a result, detrimental non-linear effects are suppressed, which allows the optical fiber to carry substantially more optical power than conventional LMA optical fibers. The LMA optical fiber is thus eminently suited for a number of optical-fiber-based applications calling for high optical power, such as fiber lasers and pump sources for wavelength conversion.
Public/Granted literature
- US20100195194A1 Large Mode Area Optical Fiber Public/Granted day:2010-08-05
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