公开(公告)号：US09322775B2

公开(公告)日：2016-04-26

申请号：US14758233

申请日：2012-12-28

Applicant: CNR—CONSIGLIO NAZIONALE DELLE RICERCHE

Inventor： Gianluca Gagliardi ,  Saverio Avino ,  Antonio Giorgini ,  Paolo De Natale

IPC: G01J3/28 ,  G01N21/39 ,  G01J3/02 ,  G01J3/433

CPC classification number: G01N21/39 ,  G01J3/02 ,  G01J3/0218 ,  G01J3/28 ,  G01J3/2803 ,  G01J2003/4332 ,  G01N2021/391 ,  G01N2021/399 ,  G01N2201/06113 ,  G01N2201/08

Abstract: The present invention relates to a method and an apparatus to perform frequency comb spectroscopy. The method includes: —Arranging a waveguide optical cavity (3) having a plurality of cavity mode frequencies with a cavity mode frequency spacing (FSR), said waveguide optical cavity being dispersive so that the frequency spacing of the cavity modes is wavelength dependent; —Arranging a sample (S) with respect to the waveguide optical cavity (3) so that the sample is capable of absorbing light travelling into the waveguide optical cavity; —Coupling pulsed light coming from a light source (1) into the waveguide optical cavity (3), the source light including source comb frequencies (OCF) with a source frequency spacing (RR), the coupled light including an interval of frequencies centered on a main frequency of said comb frequencies due to cavity dispersion; —Locking the waveguide optical cavity to the frequency comb at said main optical frequency; —Detecting transmitted cavity frequencies; —Determining absorption by said sample (S) of said main optical frequency from the detected transmitted frequencies, —Changing the cavity mode frequency (FSR) spacing or the source frequency spacing (RR); —Coupling the pulse light to the waveguide optical cavity (3), the coupled light including an interval of frequencies centered on a second main frequency of said comb frequencies due to cavity dispersion; —Locking the waveguide optical cavity to the frequency comb at said second main optical frequency; —Detecting transmitted cavity frequencies; —Determining absorption by said sample of said second main optical frequency from the detected transmitted frequencies.

Abstract translation: 本发明涉及一种执行频率梳状光谱的方法和装置。 该方法包括： - 布置具有腔模式频率间隔（FSR）的多个腔模式频率的波导光腔（3），所述波导光腔是分散的，使得腔模的频率间隔是波长相关的; - 相对于所述波导光腔（3）布置样品（S），使得所述样品能够吸收行进到所述波导光腔中的光; 将来自光源（1）的脉冲光耦合到波导光腔（3）中，源光包括源频率间隔（RR）的源梳状频率（OCF），耦合光包括以 所述梳状频率由于腔体分散的主频率; 将所述波导光腔锁定在所述主光学频率处的频率梳; 检测发射的腔体频率; - 从所检测的发射频率确定所述主光频的所述样品（S）的吸收， - 使空腔模式频率（FSR）间隔或源频间隔（RR）延长; - 将所述脉冲光耦合到所述波导光腔（3），所述耦合光包括由于空腔分散而以所述梳状频率的第二主频率为中心的频率间隔; 将所述波导光腔锁定在所述第二主光学频率处的频率梳; 检测发射的腔体频率; - 从所检测的发射频率确定所述第二主光学频率的所述样本的吸收。