EP 1084526 A1 20010321 - LASER SOURCE AND FILTERING METHOD FOR OBTAINING A GOOD OPTICAL QUALITY FROM BEAMS OF ANNULAR SECTION
Title (en)
LASER SOURCE AND FILTERING METHOD FOR OBTAINING A GOOD OPTICAL QUALITY FROM BEAMS OF ANNULAR SECTION
Title (de)
LASERQUELLE UND VERFAHREN ZUM FILTERN ZUR HERSTELLUNG MIT GUTEN OPTISCHEN STRALLUNGS EIGENSCHAFTEN IN RINGQUERSCHNITT
Title (fr)
SOURCE LASER ET PROCEDE DE FILTRAGE POUR OBTENIR UNE BONNE QUALITE OPTIQUE DE FAISCEAUX DE SECTION ANNULAIRE
Publication
Application
Priority
- IT 9900148 W 19990527
- IT FI980130 A 19980601
Abstract (en)
[origin: WO9963633A1] For concentrating a laser beam (FR), there is provided a re-phasing at a distance (SF) of the beam emitted with an output having annular geometry, the ratio between the dimension (2) in the azimuthal (in other words tangential) direction of the apertures (13A) and the periodicity (d) of the apertures being less than 1; in particular, there is provided an annular laser with a periodic cavity filter (13) having a parameter (filling factor) DELTA APPROX 0.7 DIVIDED 0.95 and a re-phasing surface at a distance delta F of the order of, for example, a few tens of cm, for a periodicity of a few mm and a wavelength of approximately 10 microns.
IPC 1-7
IPC 8 full level
G02B 27/09 (2006.01); H01S 3/08 (2006.01); H01S 3/10 (2006.01); H01S 5/14 (2006.01); H01S 5/40 (2006.01)
CPC (source: EP)
H01S 3/08 (2013.01); H01S 5/148 (2013.01); H01S 5/4062 (2013.01)
Citation (search report)
See references of WO 9963633A1
Designated contracting state (EPC)
BE CH DE ES FR GB LI NL SE
DOCDB simple family (publication)
WO 9963633 A1 19991209; AU 4163799 A 19991220; EP 1084526 A1 20010321; IT FI980130 A1 19991201; JP 2003524290 A 20030812
DOCDB simple family (application)
IT 9900148 W 19990527; AU 4163799 A 19990527; EP 99925271 A 19990527; IT FI980130 A 19980601; JP 2000552747 A 19990527