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SUPPRESSION OF AMPLIFIED SPONTANEOUS EMISSION (ASE) WITHIN LASER PLANAR WAVEGUIDE DEVICES
SUPPRESSION OF AMPLIFIED SPONTANEOUS EMISSION (ASE) WITHIN LASER PLANAR WAVEGUIDE DEVICES
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机译：激光平面波导装置内放大自发辐射（ASE）的抑制
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摘要
Optical waveguide amplifiers and associated methods for suppressing parasitic modes (ASE) in dielectric, planar waveguide amplifier structures comprises one or more of the side facets of said planar waveguide amplifier angled with respect to a fast axis defined in a transverse plane perpendicular to the core layer. A relationship between in-plane angles of incidence and threshold bevel angles θT can be used to select side bevel angles θ5 so that when the bevel angle is greater than the threshold bevel angle, parasitics are suppressed by redirecting amplified spontaneous emission (ASE) out of the core. It is possible to select the one or more bevel angles θS to be great enough to substantially redirect all but ballistic photons of any guided modes, thus effectively narrowing the numerical aperture of the planar waveguide amplifier along a slow axis defined in a transverse plane perpendicular to the fast axis. Beneficially, such improvements can be realized for three-part waveguide structures - e.g.: cladding, core, cladding - with polished facets.
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机译：用于抑制介电的平面波导放大器结构中的寄生模式（ASE）的光波导放大器和相关方法，包括所述平面波导放大器的一个或多个侧面相对于垂直于芯层的横向平面中限定的快轴成一定角度。平面内入射角与阈值倾斜角θ T 之间的关系可用于选择侧面倾斜角θ5，以便在倾斜时当角度大于阈值斜角时，通过将放大的自发辐射（ASE）重定向到磁芯之外，可以抑制寄生效应。可以选择一个或多个斜角θ S ，使其足够大，从而基本上重定向任何导模的除了弹道光子之外的所有光子，因此，沿着垂直于快轴的横向平面中定义的慢轴有效地缩小了平面波导放大器的数值孔径。有益地，可以对具有抛光小面的三部分波导结构（例如，包层，纤芯，包层）实现这种改进。
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