Title:
SHORT-PULSE LASER DEVICE WITH A PREFERABLY PASSIVE MODE COUPLING AND A MULTIPLE REFLECTION TELESCOPE THEREFOR
Document Type and Number:
WIPO Patent Application WO2003098314
Kind Code:
A3
Abstract:
The invention relates to a short-pulse laser device (11) with a preferably passive mode coupling. Said device comprises a resonator (12), which contains a laser crystal (14) in addition to several mirrors (M1-M7, OC) that define a long resonator arm (17) and a short resonator arm (16), one (M1) of said mirrors forming a pump beam coupling-in mirror and another (OC) forming a laser beam output coupler and comprising a multiple reflection telescope (18) that increases the length of the resonator and is allocated to the resonator arms (16, 17). Said telescope is constructed using mirrors (25, 26), in order to reflect a laser beam (15) that is coupled into the space between them back and forth several times, prior to being decoupled back into the other resonator, whereby sequential eccentric reflection points (1 to 8; 1' to 8') on the mirrors (25, 26) are offset in relation to one another. The telescope (18) comprises only one curved mirror (26), in addition to a planar mirror (25), whose position corresponds at least substantially to the centre (25') of an imaginary multiple reflection assembly comprising two curved mirrors (26a, 26b), whereby the one curved mirror (26) of the telescope (18) also contains the reflection points of the other imaginary curved mirror. The invention also relates to a multiple reflection telescope (18) for said device.
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Inventors:
POPPE ANDREAS (AT)
STINGL ANDREAS (AT)
STINGL ANDREAS (AT)
Application Number:
PCT/AT2003/000136
Publication Date:
July 15, 2004
Filing Date:
May 13, 2003
Export Citation:
Assignee:
FEMTOLASERS PRODUKTIONS GMBH (AT)
POPPE ANDREAS (AT)
STINGL ANDREAS (AT)
POPPE ANDREAS (AT)
STINGL ANDREAS (AT)
International Classes:
G02B17/08; H01S3/081; G02B17/00; H01S3/098; H01S3/11; (IPC1-7): H01S3/098; G02B17/08
Other References:
CHO S H ET AL: "GENERATION OF 90-NJ PULSES WITH A 4-MHZ REPETITION-RATE KERR-LENS MODE-LOCKED TI:AL2O3 LASER OPERATING WITH NET POSITIVE AND NEGATIVE INTRACAVITY DISPERSION", OPTICS LETTERS, OPTICAL SOCIETY OF AMERICA, WASHINGTON, US, vol. 26, no. 8, 15 April 2001 (2001-04-15), pages 560 - 562, XP001077217, ISSN: 0146-9592
CHO S H ET AL: "LOW-REPETITION-RATE HIGH-PEAK-POWER KERR-LENS MODE-LOCKED TI:AL2O3 LASER WITH A MULTIPLE-PASS CAVITY", OPTICS LETTERS, OPTICAL SOCIETY OF AMERICA, WASHINGTON, US, vol. 24, no. 6, 15 March 1999 (1999-03-15), pages 417 - 419, XP000829706, ISSN: 0146-9592
SENNAROGLU A ET AL: "Design criteria for Herriott-type multi-pass cavities for ultrashort pulse lasers", OPTICS EXPRESS, 5 MAY 2003, OPT. SOC. AMERICA, USA, vol. 11, no. 9, XP002280035, ISSN: 1094-4087
CHO S H ET AL: "LOW-REPETITION-RATE HIGH-PEAK-POWER KERR-LENS MODE-LOCKED TI:AL2O3 LASER WITH A MULTIPLE-PASS CAVITY", OPTICS LETTERS, OPTICAL SOCIETY OF AMERICA, WASHINGTON, US, vol. 24, no. 6, 15 March 1999 (1999-03-15), pages 417 - 419, XP000829706, ISSN: 0146-9592
SENNAROGLU A ET AL: "Design criteria for Herriott-type multi-pass cavities for ultrashort pulse lasers", OPTICS EXPRESS, 5 MAY 2003, OPT. SOC. AMERICA, USA, vol. 11, no. 9, XP002280035, ISSN: 1094-4087
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