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    • 4. 发明授权
    • Pretrimming of tunable finite response (FIR) filter
    • 预调制可调谐有限响应(FIR)滤波器
    • US06870967B2
    • 2005-03-22
    • US10268637
    • 2002-10-10
    • Dorothea W. WiesmannFolkert HorstBert OffreinGian-Luca Bona
    • Dorothea W. WiesmannFolkert HorstBert OffreinGian-Luca Bona
    • G02B6/12G02B6/125G02B6/13G02B1/01
    • G02B6/13G02B6/12007G02B6/125G02B2006/12159
    • A method of inducing phase changes in a FIR filter is provided. The FIR filter consists of a concatenation of tunable couplers and tunable delay lines made of planar waveguides fabricated in SiON technology, forming a plurality of interferometers, at least one of which carries a heater on at least one of its waveguide arms. The method includes the step of exposing at least one of the arms of the interferometers to an irradiation at UV or a smaller wavelength, thereby inducing a change in the refractive index of the waveguide arms which induces the phase difference change. The method provides a procedure that will lead to temperature-stable changes of the refractive index of the waveguides. The resulting device is temperature-stable such that it can be afterwards be heated with chromium heaters to dynamically tune its spectral response without destroying the UV-induced changes.
    • 提供了一种引入FIR滤波器的相位变化的方法。 FIR滤波器由可调谐耦合器和由SiON技术制造的平面波导制成的可调谐延迟线的级联组成,其形成多个干涉仪,其中至少一个在至少一个波导臂上承载加热器。 该方法包括将干涉仪的至少一个臂暴露于UV或较小波长的照射的步骤,从而引起导致相位差变化的波导臂的折射率的变化。 该方法提供了将导致波导的折射率的温度稳定变化的过程。 所得到的装置是温度稳定的,使得其可以随后用铬加热器加热以动态调节其光谱响应而不破坏UV诱导的变化。