Collection probe for use in a Raman spectrometer system and methods of making and using the same
View Patent ↗A photonic crystal based collection probe is provided. The probe includes a photonic crystal configured to guide and condition a beam of Raman scattered photons. Further, the device includes a spectrograph in optical communication with the photonic crystal and configured to receive Raman scattering from the photonic crystal. The device may be employed in a Raman spectrometer system.
1. A photonic crystal based collection probe, comprising:
a photonic crystal configured to focus Raman scattered photons; and
a spectrograph in optical communication with said photonic crystal and configured to receive Raman scattered photons from said photonic crystal.
2. The photonic crystal based collection probe of claim 1 , wherein said spectrograph comprises a micro electro-mechanical system spectrograph.
3. The photonic crystal based collection probe of claim 2 , wherein said spectrograph comprises a tunable Fabry-Perot filter.
4. The photonic crystal based collection probe of claim 1 , further comprising a photonic crystal configured to collimate said Raman scattered photons.
5. The photonic crystal based collection probe of claim 1 , further comprising a photonic crystal configured to enhance reflectance and finesse of a micro electro mechanical spectrograph.
6. The photonic crystal based collection probe of claim 1 , further comprising a filter for Rayleigh scattering separation.
7. The photonic crystal based collection probe of claim 6 , wherein the filter for Rayleigh scattering separation comprises a photonic crystal configured to filter Rayleigh scattered photons from said Raman scattered photons.
8. The photonic crystal based collection probe of claim 6 , wherein said filter comprises a fiber Bragg grating device.
9. The photonic crystal based collection probe of claim 8 , wherein a grating period of said fiber Bragg grating device is about 330 nanometers.
10. The photonic crystal based collection probe of claim 7 , wherein a rejection efficiency of said filter is in a range of from about 80 percent to about 100 percent.
11. The photonic crystal based collection probe of claim 6 , wherein said filter comprises a sub-wavelength optical grating.
12. A Raman spectrometer system, comprising:
an electromagnetic radiation source configured to direct electromagnetic radiation on a sample, wherein said sample is configured to interact with said electromagnetic radiation to convert at least a portion of said electromagnetic radiation into Raman scattering and Rayleigh scattering;
a photonic crystal configured to focus said Raman scattering; and
a spectrograph configured to receive said Raman scattering focused from said photonic crystal.
13. The Raman spectrometer system as defined in claim 12 , further comprising a fiber Bragg grating device disposed between said photonic crystal and said spectrograph.
14. The Raman spectrometer system as defined in claim 13 , wherein said fiber Bragg grating device is configured to reject at least a portion of a radiation of predetermined wavelength.
15. The Raman spectrometer system as defined in claim 13 , wherein said fiber Bragg grating device is coupled to a heater for altering a pitch of said fiber Bragg grating.
16. The Raman spectrometer system as defined in claim 12 , wherein said sample is disposed in a microfluidic channel.
17. The Raman spectrometer system as defined in claim 12 , wherein said photonic crystal is disposed in a microfluidic channel.
18. The Raman spectrometer system as defined in claim 12 , further comprising a photonic crystal configured to filter Rayleigh scattering from said from said Raman scattering.
19. The Raman spectrometer system as defined in claim 18 , wherein said photonic crystal is disposed in a microfluidic device.
20. The Raman spectrometer system as defined in claim 12 , further comprising a photonic crystal configured to collimate said Raman scattering.
21. The Raman spectrometer system as defined in claim 12 , further comprising a photonic crystal configured to enhance reflectance of photons of said Raman scattering.