公开(公告)号：EP3155384A1

公开(公告)日：2017-04-19

申请号：EP15729819.1

申请日：2015-06-16

Applicant: ETH Zürich

Inventor： HUGI, Andreas ,  FERREIRA VILLARES, Gustavo Filipe ,  FAIST, Jérôme

IPC: G01J3/10 ,  G01J3/433 ,  G01J9/04

CPC classification number: H04B10/64 ,  G01J3/10 ,  G01J3/433 ,  G01J9/0246 ,  G01J9/04 ,  G01J2003/423 ,  H04B10/504 ,  H04B10/505 ,  H04B10/524

Abstract: A method for optical and electrical signal processing of a multi-heterodyne signal generated by a multi-mode semi-conductor laser, for a system comprising two laser sources and an sample interaction unit. At least the beam of one of the laser passes through said sample interaction unit before being combined on a detector. The first laser is tuned (40=>42) by an amount keeping the tuning result within the available detector bandwidth (55). Then the second laser is roughly tuned by the same amount as the tuning of the first laser to bring back the signal to the vicinity (48) of the original place in the RF-domain and within the bandwidth (55) of the detector. The tuning steps are repeated with different value of mode spacing for reconstructing the sample spectrum and provide a high resolution image of the dip (41) absorption line (40).

Abstract translation: 本发明涉及一种用于由多模的半导体激光器，其中该系统包括两个激光源和样品的相互作用单元产生的多外差信号的光学和电学信号处理的方法，worin至少之一的光束 激光器在检测器上被组合之前穿过所述交互单元。 两个激光器被调谐到重叠光谱，以产生在检测器（20）的带宽的外差信号。 然后，第一激光通过在保持量所述检测器的可用带宽（55）内的调谐结果调谐（40 => 42）。 然后第二激光器是通过相同量的粗略调谐的作为第一激光器的调谐带回信号以在RF域中的原位置附近（48）和所述检测器的带宽（55）内。 最后，重复调谐步骤许多与模间隔的不同值乘以用于重构样品光谱和提供浸渍（41）的吸收线（40）的高分辨率图像。