公开(公告)号：WO2021148771A1

公开(公告)日：2021-07-29

申请号：PCT/GB2021/000004

申请日：2021-01-19

Applicant: THE SECRETARY OF STATE FOR DEFENCE

Inventor： McEWAN, Kenneth, John

IPC: G01J3/02 ,  F41G11/00 ,  G01J3/28 ,  G01J3/44 ,  G01N21/65 ,  H04N5/3745 ,  G01J3/0202 ,  G01J3/2803 ,  G01N2021/1793 ,  G01N2201/0697

Abstract: Apparatus for stand-off Raman spectroscopy, comprising optical imaging device (e.g. a sight, e.g. of a rifle), Laser, Optical apparatus (optionally in the form of an adapter) with a wavelength band filter and optical dispersion means (e.g. grating) to disperse a Raman spectrum to an image sensor, and focusing means wherein the laser is a pulsed laser, and each of the detector elements of the array comprises a frequency band pass filter for detecting light pulses in preference to background radiation. Each detector element is provided with a first charge storage element to store charge, connected via a frequency band pass filter to a second charge storage element arranged to store charge preferentially resulting from high frequency light pulses. This may be performed in the short wave infrared spectrum. The image sensor can also have conventional detector elements, enabling viewing of a scene whilst simultaneously obtaining a Raman spectrum of a target in the scene. Advantageously this may be implemented in a rifle sight, optionally by means of an adapter arranged so that the rifle sight can be readily switched from conventional viewing mode to stand off Raman spectroscopy mode.

公开(公告)号：WO2022207410A1

公开(公告)日：2022-10-06

申请号：PCT/EP2022/057493

申请日：2022-03-22

Applicant: MAX-PLANCK-GESELLSCHAFT ZUR FÖRDERUNG DER WISSENSCHAFTEN E. V.

Inventor： FILL, Ernst ,  HÖGNER, Maximilian ,  KRAUSZ, Ferenc ,  PUPEZA, Ioachim ,  RAAB, Ann-Kathrin ,  VORONINA, Liudmila ,  ZIGMAN, Mihaela

IPC: H01S3/00 ,  G01N21/35 ,  G02F1/00 ,  G01J3/10 ,  G01N21/3504 ,  G01N21/39 ,  G01N2201/0697 ,  H01S3/005 ,  H01S3/0057 ,  H01S3/0092

Abstract: A method of passively enhancing pulsed laser light by coherent addition of laser pulses in an enhancement cavity (20) comprises the steps of generating a sequence of seed laser pulses (1) with a repetition frequency frep and a frequency comb spectrum (3) comprising frequency comb lines (4) with frequency comb line spacings equal to the repetition frequency frep, coupling the seed laser pulses (1) via a first plate-shaped coupling element (25) into an enhancement cavity (20) comprising at least two cavity mirrors (21, 22, 23, 24) having metallic surfaces and spanning a cavity beam path (26) with a resonator length L, wherein the enhancement cavity (20) has a fundamental transverse mode TEM00 and higher-order transverse cavity modes TEMnm, each with a series of cavity resonance frequencies (5), and a cavity offset frequency (6), and coherent superposition of the seed laser pulses (1) in the enhancement cavity (20), so that at least one enhanced circulating cavity pulse (2) per cavity length is generated, wherein the frequency comb spectrum (3) is a harmonic frequency comb spectrum (3) with a vanishing seeding comb offset frequency, the enhancement cavity (20) is adjusted such that a round-trip carrier-envelope phase slippage of the circulating cavity pulses 2 is equal to 360°/N for the fundamental transverse mode TEM00, N being an integer number equal to or above (2), and a frequency overlap is provided for a plurality of the cavity resonance frequencies (5) with a plurality of the frequency comb lines (4) along the frequency comb spectrum (3). Furthermore, a laser pulse enhancement apparatus and applications thereof, e. g. in field-resolved spectroscopy, are described.

公开(公告)号：WO2021146346A1

公开(公告)日：2021-07-22

申请号：PCT/US2021/013320

申请日：2021-01-13

Applicant: QUANTUM-SI INCORPORATED

Inventor： BELLOS, Michael ,  GORYAYNOV, Alexander ,  CIRRIANY, Benjamin ,  SHI, Xinghua ,  AHMAD, Faisal, R.

IPC: H01S3/00 ,  H01S3/102 ,  H01S3/11 ,  H01S3/081 ,  H01S3/08 ,  G01N21/64 ,  H01S3/02 ,  H01S3/16 ,  H01S3/04 ,  H01S3/06 ,  H01S3/13 ,  G01N2021/6421 ,  G01N21/6402 ,  G01N21/6408 ,  G01N21/6454 ,  G01N21/648 ,  G01N2201/0697 ,  H01S3/0085 ,  H01S3/025 ,  H01S3/027 ,  H01S3/0405 ,  H01S3/0623 ,  H01S3/08045 ,  H01S3/0805 ,  H01S3/08059 ,  H01S3/08072 ,  H01S3/0813 ,  H01S3/10038 ,  H01S3/1022 ,  H01S3/1024 ,  H01S3/1068 ,  H01S3/107 ,  H01S3/1115 ,  H01S3/1118 ,  H01S3/13017 ,  H01S3/1305 ,  H01S3/1611 ,  H01S3/1673

Abstract: Systems and methods are described for producing an amplitude-modulated laser pulse train. The laser pulse train can be used to cause fluorescence in materials at which the pulse trains are directed. The parameters of the laser pulse train are selected to increase fluorescence relative to a constant-amplitude laser pulse train. The amplitude-modulated laser pulse trains produced using the teachings of this invention can be used to enable detection of specific molecules in applications such as gene or protein sequencing.

公开(公告)号：WO2021144107A1

公开(公告)日：2021-07-22

申请号：PCT/EP2020/086426

申请日：2020-12-16

Applicant: OSRAM OPTO SEMICONDUCTORS GMBH

Inventor： RUSSELL, Ann ,  HALBRITTER, Hubert ,  GOELTNER, Christoph

IPC: G01N21/65 ,  G01J3/44 ,  G01J2003/4424 ,  G01N2021/653 ,  G01N2201/0221 ,  G01N2201/0612 ,  G01N2201/0697

Abstract: An apparatus (101), a handheld electronic device (201) and a method for carrying out Raman Spectroscopy are disclosed. In an embodiment an apparatus includes at least one optoelectronic laser (203) configured to provide excitation radiation (207) to a sample (205), the excitation radiation (207) being generated by an electric current flowing through the at least one optoelectronic laser (203) during operation of the apparatus and a transistor (211) configured to modulate the electric current flowing through the at least one optoelectronic laser (203), to thereby switch on and off generation of the excitation radiation (207).