Microfluidic sensors and methods for making the same
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G02B-006/00
G01N-021/05
G01N-021/03
출원번호
US-0040269
(2005-01-21)
등록번호
US-7391936
(2008-06-24)
발명자
/ 주소
Pau,Stanley
Earnshaw,Mark P.
출원인 / 주소
Lucent Technologies, Inc.
인용정보
피인용 횟수 :
5인용 특허 :
22
초록▼
Microfluidic optical sensor comprising: an optical waveguide capable of propagating light from an optical input port to an optical output port, the optical waveguide comprising an optical waveguide interaction region; a fluidic channel capable of conducting a fluid from a fluid input port to a fluid
Microfluidic optical sensor comprising: an optical waveguide capable of propagating light from an optical input port to an optical output port, the optical waveguide comprising an optical waveguide interaction region; a fluidic channel capable of conducting a fluid from a fluid input port to a fluid output port, the fluidic channel comprising a fluidic channel region; the fluidic channel region being separated from the optical waveguide interaction region by an interposed spacing material configured to transmit an evanescent field of the light through the spacing material between the optical waveguide interaction region and the fluidic channel region. Microfluidic optical sensor comprising an optical resonator. Methods for making microfluidic optical sensors.
대표청구항▼
We claim: 1. A microfluidic optical sensor, comprising: an optical waveguide extending between an optical input port and an optical output port, said optical waveguide being capable of propagating light from said optical input port to said optical output port, said optical waveguide comprising an o
We claim: 1. A microfluidic optical sensor, comprising: an optical waveguide extending between an optical input port and an optical output port, said optical waveguide being capable of propagating light from said optical input port to said optical output port, said optical waveguide comprising an optical waveguide interaction region that comprises an optical waveguide loop; a fluidic channel extending between a fluid input port and a fluid output port, said fluidic channel being capable of conducting a fluid from said fluid input port to said fluid output port, said fluidic channel comprising a fluidic channel region; said fluidic channel region being aligned in a sandwich with said optical waveguide interaction region and separated from said optical waveguide interaction region by an interposed spacing material having a thickness; said thickness being configured to enable transmission of an evanescent field of light through said spacing material between said optical waveguide interaction region and said fluidic channel region. 2. The microfluidic optical sensor of claim 1, in which said fluidic channel region and said optical waveguide interaction region are substantially mutually parallel over a distance. 3. The micro fluidic optical sensor of claim 1, in which said fluidic channel region has a first width dimension transverse to a direction of flow of a fluid from said fluid input port to said fluid output port, and in which said optical waveguide interaction region has a second width dimension transverse to a direction of propagation of light from said optical input port to said optical output port, said first width dimension being at least about as large as said second width dimension. 4. The microfluidic optical sensor of claim 3, in which said first width dimension is greater than said second width dimension. 5. The microfluidic optical sensor of claim 1, comprising a second fluidic channel extending between a second fluid input port and a second fluid output port, said second fluidic channel being capable of conducting a fluid from said second fluid input port to said second fluid output port, said second fluidic channel comprising a second fluidic channel region, said second fluidic channel region being aligned in a sandwich with said optical waveguide interaction region and separated from said optical waveguide interaction region by an interposed second spacing material having a second thickness configured to enable transmission of an evanescent field of light through said second spacing material between said optical waveguide interaction region and said second fluidic channel region. 6. The microfluidic optical sensor of claim 1, comprising an optical waveguide interaction region comprising a plurality of optical waveguide loops which are mutually nested to form a spiral having a circumference formed by an outermost optical waveguide loop. 7. The microfluidic optical sensor of claim 1, in which said fluidic channel region has a width dimension transverse to a direction of flow of a fluid from said fluid input port to said fluid output port, said width dimension being at least about as large as a circumference formed by an outermost optical waveguide loop. 8. The microfluidic optical sensor of claim 7, in which said width dimension is greater than said circumference. 9. The microfluidic optical sensor of claim 1, comprising a plurality of fluidic channel regions of said fluidic channel separated from a respective plurality of optical waveguide interaction regions by interposed spacing layers. 10. The microfluidic optical sensor of claim 1, further comprising a second optical waveguide extending between a second optical input port and a second optical output port, said second optical waveguide being capable of propagating light from said second optical input port to said second optical output port, said second optical waveguide comprising a second optical waveguide interaction region that comprises a second optical waveguide loop. 11. A microfluidic optical sensor, comprising: an optical waveguide extending between an optical input port and an optical output port, said optical waveguide being capable of propagating light from said optical input port to said optical output port; a fluidic channel extending between a fluid input port and a fluid output port, said fluidic channel being capable of conducting a fluid from said fluid input port to said fluid output port; an optical resonator separated from said optical waveguide by a first spacing material having a first thickness between the optical resonator and the optical waveguide; said first thickness being configured to enable transmission of an evanescent field of light through the first spacing material between said optical waveguide and said optical resonator; said fluidic channel comprising a fluidic cavity region separated from said optical resonator by a second spacing material having a second thickness between the fluidic cavity region and the optical resonator; said second thickness being configured to enable transmission of an evanescent field of light through the second spacing material between said optical resonator and said fluidic cavity region. 12. The microfluidic optical sensor of claim 11, comprising a plurality of optical resonators. 13. The microfluidic optical sensor of claim 11, where the optical resonator includes a perimeter configured to cause multiple reflections of light. 14. The microfluidic optical sensor of claim 11, in which: said optical resonator comprises a first circumference; said fluidic channel region comprises a second circumference; and said second circumference is at least about as large as said first circumference. 15. The microfluidic optical sensor of claim 11, further comprising a second fluidic channel extending between a second fluid input port and a second fluid output port, said second fluidic channel being capable of conducting a fluid from said second fluid input port to said second fluid output port, said second fluidic channel comprising a second fluidic cavity region separated from said optical resonator by a third spacing material having a third thickness between said second fluidic cavity region and said optical resonator, said third thickness enabling transmission of an evanescent field of light through said third spacing material between said optical resonator and said second fluidic cavity region. 16. A method of making a microfluidic optical sensor, comprising the steps of: forming an optical waveguide extending between an optical input port and an optical output port, said optical waveguide being capable of propagating light from said optical input port to said optical output port, said optical waveguide comprising an optical waveguide interaction region that comprises an optical waveguide loop; forming a fluidic channel extending between a fluid input port and a fluid output port, said fluidic channel being capable of conducting a fluid from said fluid input port to said fluid output port, said fluidic channel comprising a fluidic channel region; wherein said fluidic channel region and said optical waveguide interaction region are aligned in a sandwich and a spacing material, having a thickness, is interposed between said fluidic channel region and said optical waveguide interaction region; and wherein said thickness is configured to enable transmission of an evanescent field of light through said spacing material between said optical waveguide interaction region and said fluidic channel region. 17. The method of claim 16, comprising the steps of: forming a fluidic channel region having a first width dimension transverse to a direction of flow of a fluid from said fluid input port to said fluid output port; wherein the optical waveguide interaction region has a second width dimension transverse to a direction of propagation of light from said optical input port to said optical output port, said first width dimension being at least about as large as said second width dimension. 18. The method of claim 16, wherein forming an optical waveguide includes forming an optical waveguide interaction region comprising a plurality of optical waveguide loops which are mutually nested to form a spiral having a circumference formed by an outermost optical waveguide loop. 19. A method of making a microfluidic optical sensor, comprising the steps of: forming an optical waveguide extending between an optical input port and an optical output port, said optical waveguide being capable of propagating light from said optical input port to said optical output port; forming a fluidic channel extending between a fluid input port and a fluid output port, said fluidic channel being capable of conducting a fluid from said fluid input port to said fluid output port, said fluidic channel comprising a fluidic cavity region; forming an optical resonator separated from said optical waveguide by a first spacing material having a first thickness between the optical resonator and the optical waveguide; wherein said first thickness enables transmission of an evanescent field of light through the first spacing material between said optical waveguide and said optical resonator; wherein a second spacing material having a second thickness separates said fluidic cavity region and said optical resonator, said second thickness enabling transmission of an evanescent field of light through the second spacing material between said optical resonator and said fluidic cavity region. 20. The method of claim 19 wherein forming an optical resonator includes forming an optical resonator that comprises a first circumference; and wherein forming a fluidic channel includes forming a fluidic channel region that comprises a second circumference; said second circumference being at least about as large as said first circumference. 21. The method of claim 19, further comprising the steps of: forming a plurality of optical resonators, said plurality of optical resonators being separated from said optical waveguide by a first spacing material having a first thickness between the optical resonators and the optical waveguide, said first thickness enabling transmission of an evanescent field of light through the first spacing material between said optical waveguide and said optical resonators; and wherein a second spacing material having a second thickness separates said fluidic cavity region and said optical resonator, said second thickness enabling transmission of an evanescent field of light through the second spacing material between said optical resonators and said fluidic cavity region.
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