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    • 38. 发明授权
    • Large diameter optical waveguide, grating and laser
    • 大直径光波导,光栅和激光
    • US07437043B2
    • 2008-10-14
    • US11324759
    • 2006-01-03
    • Martin A. PutnamRobert N. BrucatoPaul E. SandersTimothy J. BaileyJames M. SullivanAlan D. Kersey
    • Martin A. PutnamRobert N. BrucatoPaul E. SandersTimothy J. BaileyJames M. SullivanAlan D. Kersey
    • G02B6/02
    • G02B6/022G02B6/02G02B6/02042H01S3/06708H01S3/06729H01S3/06754
    • A large diameter optical waveguide, grating, and laser includes a waveguide 10 having at least one core 12 surrounded by a cladding 14, the core propagating light in substantially a few transverse spatial modes; and having an outer waveguide dimension d2 of said waveguide being greater than about 0.3 mm. At least one Bragg grating 16 may be impressed in the waveguide 10. The waveguide 10 may be axially compressed which causes the length L of the waveguide 10 to decrease without buckling. The waveguide 10 may be used for any application where a waveguide needs to be compression tuned, e.g., compression-tuned fiber gratings and lasers or other applications. Also, the waveguide 10 exhibits lower mode coupling from the core 12 to the cladding 14 and allows for higher optical power to be used when writing gratings 16 without damaging the waveguide 10. The shape of the waveguide 10 may have other geometries (e.g., a “dogbone” shape) and/or more than one grating or pair of gratings may be used and more than one core may be used. The core and/or cladding 12,14 may be doped with a rare-earth dopant and/or may be photosensitive. At least a portion of the core 12 may be doped between a pair of gratings 50,52 to form a fiber laser or the grating 16 or may be constructed as a tunable DFB fiber laser or an interactive fiber laser within the waveguide 10. The waveguide may resemble a short “block” or a longer “cane” type, depending on the application and dimensions used.
    • 大直径光波导,光栅和激光器包括具有由包层14围绕的至少一个芯12的波导10,芯以基本上几个横向空间模式传播光; 并且所述波导的外波导尺寸d 2大于约0.3mm。 可以在波导10中施加至少一个布拉格光栅16.波导10可以被轴向压缩,这导致波导10的长度L在没有弯曲的情况下减小。 波导管10可用于波导需要被压缩调谐的任何应用,例如压缩调谐的光纤光栅和激光器或其它应用。 此外,波导10表现出从芯12到包层14的较低模式耦合,并且允许在写入光栅16时使用更高的光功率,而不损坏波导10.波导10的形状可具有其他几何形状(例如, “狗骨”形状)和/或可以使用多于一个的光栅或一对光栅,并且可以使用多于一个的核心。 芯和/或包层12,14可掺杂稀土掺杂剂和/或可以是光敏的。 芯12的至少一部分可以掺杂在一对光栅50,52之间以形成光纤激光器或光栅16,或者可以被构造为波导10内的可调DFB光纤激光器或交互光纤激光器。波导 可能类似于短的“块”或更长的“手杖”类型,具体取决于所使用的应用和尺寸。