公开(公告)号：US10718668B2

公开(公告)日：2020-07-21

申请号：US16058927

申请日：2018-08-08

申请人： Tian Gu ,  Derek Matthew Kita ,  Juejun Hu

发明人： Tian Gu ,  Derek Matthew Kita ,  Juejun Hu

IPC分类号： G01J3/44 ,  G01J3/453 ,  G01J3/02 ,  G01N21/65

摘要： State-of-the-art portable Raman spectrometers use discrete free-space optical components that must be aligned well and that don't tolerate vibrations well. Conversely, the inventive spectrometers are made with monolithic photonic integration to fabricate some or all optical components on one or more planar substrates. Photonic integration enables dense integration of components, eliminates manual alignment and individual component assembly, and yields superior mechanical stability and resistance to shock or vibration. These features make inventive spectrometers especially suitable for use in high-performance portable or wearable sensors. They also yield significant performance advantages, including a large (e.g., 10,000-fold) increase in Raman scattering efficiency resulting from on-chip interaction of the tightly localized optical mode and the analyte and a large enhancement in spectral resolution and sensitivity resulting from the integration of an on-chip Fourier-transform spectrometer.

公开(公告)号：US10240980B2

公开(公告)日：2019-03-26

申请号：US15602323

申请日：2017-05-23

申请人： Juejun Hu ,  Tian Gu ,  Kazumi Wada ,  Anuradha Murthy Agarwal ,  Lionel Cooper Kimerling ,  Derek Matthew Kita ,  Junying Li ,  Fleur Jacolien Fok

发明人： Juejun Hu ,  Tian Gu ,  Kazumi Wada ,  Anuradha Murthy Agarwal ,  Lionel Cooper Kimerling ,  Derek Matthew Kita ,  Junying Li ,  Fleur Jacolien Fok

IPC分类号： G01N21/25 ,  G01J3/12 ,  G01J3/02 ,  G01J3/28 ,  G01J3/32

摘要： An apparatus for generating a spectral image includes a filter to receive incident light. The filter has a variable refractive index. The apparatus also includes a modulator, operably coupled to the filter, to modulate the variable refractive index of the filter so as to generate a plurality of optical patterns from the incident light. The plurality of optical patterns represents the spectral image and each optical pattern in the plurality of optical patterns corresponds to a different modulation of the variable refractive index. The apparatus further includes a detector, in optical communication with the filter, to detect the plurality of optical patterns.

公开(公告)号：US20170299434A1

公开(公告)日：2017-10-19

申请号：US15602323

申请日：2017-05-23

申请人： Juejun Hu ,  Tian GU ,  Kazumi WADA ,  Anuradha Murthy AGARWAL ,  Lionel Cooper KIMERLING ,  Derek Matthew KITA ,  Junying LI ,  Fleur Jacolien FOK

发明人： Juejun Hu ,  Tian GU ,  Kazumi WADA ,  Anuradha Murthy AGARWAL ,  Lionel Cooper KIMERLING ,  Derek Matthew KITA ,  Junying LI ,  Fleur Jacolien FOK

IPC分类号： G01J3/12 ,  G01J3/02 ,  G01J3/28

CPC分类号： G01J3/12 ,  G01J3/0208 ,  G01J3/0218 ,  G01J3/0237 ,  G01J3/2823 ,  G01J3/32 ,  G01J2003/1226

摘要： An apparatus for generating a spectral image includes a filter to receive incident light. The filter has a variable refractive index. The apparatus also includes a modulator, operably coupled to the filter, to modulate the variable refractive index of the filter so as to generate a plurality of optical patterns from the incident light. The plurality of optical patterns represents the spectral image and each optical pattern in the plurality of optical patterns corresponds to a different modulation of the variable refractive index. The apparatus further includes a detector, in optical communication with the filter, to detect the plurality of optical patterns.

公开(公告)号：US20190049300A1

公开(公告)日：2019-02-14

申请号：US16058927

申请日：2018-08-08

申请人： Tian GU ,  Derek Matthew KITA ,  Juejun HU

发明人： Tian GU ,  Derek Matthew KITA ,  Juejun HU

IPC分类号： G01J3/44 ,  G01N21/65 ,  G01J3/453

CPC分类号： G01J3/44 ,  G01J3/0218 ,  G01J3/0259 ,  G01J3/0272 ,  G01J3/453 ,  G01J3/4532 ,  G01N21/65

摘要： State-of-the-art portable Raman spectrometers use discrete free-space optical components that must be aligned well and that don't tolerate vibrations well. Conversely, the inventive spectrometers are made with monolithic photonic integration to fabricate some or all optical components on one or more planar substrates. Photonic integration enables dense integration of components, eliminates manual alignment and individual component assembly, and yields superior mechanical stability and resistance to shock or vibration. These features make inventive spectrometers especially suitable for use in high-performance portable or wearable sensors. They also yield significant performance advantages, including a large (e.g., 10,000-fold) increase in Raman scattering efficiency resulting from on-chip interaction of the tightly localized optical mode and the analyte and a large enhancement in spectral resolution and sensitivity resulting from the integration of an on-chip Fourier-transform spectrometer.

公开(公告)号：US20170227399A1

公开(公告)日：2017-08-10

申请号：US15429321

申请日：2017-02-10

申请人： Juejun Hu ,  Tian Gu ,  Hongtao Lin ,  Derek Matthew Kita ,  Anuradha M. Agarwal

发明人： Juejun Hu ,  Tian Gu ,  Hongtao Lin ,  Derek Matthew Kita ,  Anuradha M. Agarwal

IPC分类号： G01J3/453 ,  G02F1/313 ,  G01J3/02

CPC分类号： G01J3/4531 ,  G01J3/0218 ,  G02F1/313 ,  G02F1/3136 ,  G02F2001/311

摘要： A spectrometer includes an interferometer having a first interference arm and a second interference arm to produce interference patterns from incident light. At least one of the interference arms includes a series of cascaded optical switches connected by two (or more) waveguides of different lengths. Each optical switch directs the incident light into one waveguide or another, thereby changing the optical path length difference between the first interference arm and the second interference arm. This approach can be extended to multi-mode incident light by placing parallel interferometers together, each of which performs spectroscopy of one single mode in the multi-mode incident light. To maintain the compactness of the spectrometer, adjacent interferometers can share one interference arm.