Title:
METHOD AND DEVICE FOR TIME-GATED AMPLIFICATION OF PHOTONS
Document Type and Number:
WIPO Patent Application WO2004079444
Kind Code:
A3
Abstract:
The invention relates to a method for the selective amplification of signal photons of a signal pulse (4) in a desired time window. For this purpose, the signal photons (4) are passed through an activated amplification medium (1), where amplification takes place by induced emissions. The amplification is terminated at a desired point in time by the irradiation of a quench pulse (7). Optionally, the start of amplification can be determined by an irradiated pump pulse (8). Emissions that are not correlated with the signal pulse (4) can be suppressed by means of a spectral filter (2). Furthermore, an intensity filter such as a saturable absorber (3) can suppress unamplified fractions of the emission (5) leaving the amplification medium (1). Applications of the method include medical optical imaging and tomography by transillumination with time-gated detection of ballistic photons.
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Inventors:
NIELSEN TIM (DE)
KRUEGER SASCHA (DE)
KRUEGER SASCHA (DE)
Application Number:
PCT/IB2004/000555
Publication Date:
November 11, 2004
Filing Date:
March 03, 2004
Export Citation:
Assignee:
PHILIPS INTELLECTUAL PROPERTY (DE)
KONINKL PHILIPS ELECTRONICS NV (NL)
NIELSEN TIM (DE)
KRUEGER SASCHA (DE)
KONINKL PHILIPS ELECTRONICS NV (NL)
NIELSEN TIM (DE)
KRUEGER SASCHA (DE)
International Classes:
A61B5/00; G01N21/47; G02F1/35; G02F1/39; H01S3/00; H01S3/102; (IPC1-7): G02F1/35; H01S3/00; G01N21/47; A61B5/00
Foreign References:
| EP0926783A1 | 1999-06-30 |
Other References:
MINOSHIMA K ET AL: "THREE-DIMENSIONAL IMAGING USING A FEMTOSECOND AMPLIFYING OPTICAL KERR GATE", OPTICAL ENGINEERING, SOC. OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS. BELLINGHAM, US, vol. 38, no. 10, October 1999 (1999-10-01), pages 1758 - 1762, XP000859865, ISSN: 0091-3286
LANDEN O L ET AL: "ULTRAFAST GAIN QUENCHING IN LASER AMPLIFIERS", OPTICS LETTERS, OPTICAL SOCIETY OF AMERICA, vol. 16, no. 8, 15 April 1991 (1991-04-15), WASHINGTON, US, pages 590 - 592, XP000202040, ISSN: 0146-9592
MARENGO S ET AL: "TIME-GATED TRANSILLUMINATION OF OBJECTS IN HIGHLY SCATTERING MEDIA USING A SUBPICOSECOND OPTICAL AMPLIFIER", IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, IEEE SERVICE CENTER, US, vol. 5, no. 4, July 1999 (1999-07-01), pages 895 - 900, XP000893452, ISSN: 1077-260X
HEBDEN J C ET AL: "OPTICAL IMAGING IN MEDICINE: I. EXPERIMENTAL TECHNIQUES", PHYSICS IN MEDICINE AND BIOLOGY, TAYLOR AND FRANCIS LTD. LONDON, GB, vol. 42, no. 5, 1 May 1997 (1997-05-01), pages 825 - 840, XP000690608, ISSN: 0031-9155
LANDEN O L ET AL: "ULTRAFAST GAIN QUENCHING IN LASER AMPLIFIERS", OPTICS LETTERS, OPTICAL SOCIETY OF AMERICA, vol. 16, no. 8, 15 April 1991 (1991-04-15), WASHINGTON, US, pages 590 - 592, XP000202040, ISSN: 0146-9592
MARENGO S ET AL: "TIME-GATED TRANSILLUMINATION OF OBJECTS IN HIGHLY SCATTERING MEDIA USING A SUBPICOSECOND OPTICAL AMPLIFIER", IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, IEEE SERVICE CENTER, US, vol. 5, no. 4, July 1999 (1999-07-01), pages 895 - 900, XP000893452, ISSN: 1077-260X
HEBDEN J C ET AL: "OPTICAL IMAGING IN MEDICINE: I. EXPERIMENTAL TECHNIQUES", PHYSICS IN MEDICINE AND BIOLOGY, TAYLOR AND FRANCIS LTD. LONDON, GB, vol. 42, no. 5, 1 May 1997 (1997-05-01), pages 825 - 840, XP000690608, ISSN: 0031-9155
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