公开(公告)号：US5963359A

公开(公告)日：1999-10-05

申请号：US876485

申请日：1997-06-16

申请人： Keisuke Shinozaki ,  Chang-Qing Xu ,  Hironori Sasaki

发明人： Keisuke Shinozaki ,  Chang-Qing Xu ,  Hironori Sasaki

IPC分类号： G02B3/06 ,  G02B5/00 ,  G02B27/44 ,  G02F1/35 ,  G02F1/37

CPC分类号： G02B3/06 ,  G02B27/4277 ,  G02B5/001 ,  G02B5/1876 ,  G02F1/37 ,  G02F1/3534 ,  G02F2001/3548

摘要： A non-diffracting beam generator converts coherent light from a semiconductor laser into a small, intense, non-diffracting beam, which is directed into a non-linear optical element. The non-linear optical element converts this beam to light of a different wavelength. The non-linear optical element is a bulk element, not having an internal waveguide, and not requiring precise alignment of the non-diffracting beam. The non-diffracting beam preferably has a length matching the thickness of the non-linear optical element.

摘要翻译： 非衍射光束发生器将来自半导体激光器的相干光转换成小的，强烈的非衍射光束，其被引导到非线性光学元件中。 非线性光学元件将该光束转换成不同波长的光。 非线性光学元件是不具有内部波导的体元件，并且不需要非衍射光束的精确对准。 非衍射光束优选具有与非线性光学元件的厚度相匹配的长度。

公开(公告)号：US5946129A

公开(公告)日：1999-08-31

申请号：US920884

申请日：1997-08-29

申请人： Chang-Qing Xu ,  Hideaki Okayama ,  Keisuke Shinozaki

发明人： Chang-Qing Xu ,  Hideaki Okayama ,  Keisuke Shinozaki

IPC分类号： H01S3/109 ,  H01S5/10 ,  H01S5/50 ,  G02F1/39

CPC分类号： H01S3/109 ,  H01S5/1071 ,  H01S5/50

摘要： A wavelength conversion apparatus has an optical amplifier, a wavelength converter, and an optical coupler coupled to form an optical ring resonator. The optical amplifier supplies pump light. The wavelength converter generates converted light, either from the pump light alone or by interaction between the pump light and signal light supplied from a signal source. The optical coupler extracts the converted light. The optical ring resonator preferably includes a tunable optical bandpass filter that defines the wavelength of the pump light. The optical coupler may also couple the signal light into the optical ring resonator, preferably through a polarization beam splitter and at least one polarization rotator, making the apparatus insensitive to the polarization of the signal light.

摘要翻译： 波长转换装置具有耦合以形成光环谐振器的光放大器，波长转换器和光耦合器。 光放大器提供泵浦光。 波长转换器可以单独从泵浦光或通过泵浦光与从信号源提供的信号光之间的相互作用产生转换的光。 光耦合器提取转换的光。 光环谐振器优选地包括限定泵浦光的波长的可调光学带通滤波器。 光耦合器还可以将信号光耦合到光环谐振器中，优选地通过偏振分束器和至少一个偏振旋转器，使得该装置对信号光的偏振不敏感。

公开(公告)号：US07340119B1

公开(公告)日：2008-03-04

申请号：US11407252

申请日：2006-04-20

申请人： Chang-Qing Xu ,  Jian Yang

发明人： Chang-Qing Xu ,  Jian Yang

IPC分类号： G02B6/00

CPC分类号： G02B6/02104 ,  G01N21/774

摘要： An optical sensor has a core, a cladding, and an over-layer. In some embodiments the optical sensor also has a sensing layer. The over-layer acts as a sensitivity enhancement layer, with a refractive index larger than that of the cladding layers. A periodic structure, such as a long-period grating (LPG), is formed in the core. A transmission spectrum of the device shows several notches due to the existence of the LPG. A change in the sensing layer's refractive index and/or thickness results in a shift in the notch wavelengths of the LPG. By choosing proper refractive indices and thicknesses of the core, the cladding and the over-layer, the shift in the notch wavelengths can be significantly enhanced.

摘要翻译： 光学传感器具有芯，包层和上层。 在一些实施例中，光学传感器还具有感测层。 上层作为灵敏度增强层，其折射率大于包覆层的折射率。 在核心中形成周期性结构，例如长周期光栅（LPG）。 由于LPG的存在，该装置的透射光谱显示出几个凹口。 感测层的折射率和/或厚度的变化导致LPG的陷波波长的偏移。 通过选择芯，包层和上层的适当的折射率和厚度，可以显着提高陷波波长的偏移。