Global Patent Index - EP 4305715 A4

EP 4305715 A4 20240522 - VARIABLE REPETITION RATE MULTIPLIER BASED ON POLARIZATION ROTATION

Title (en)

VARIABLE REPETITION RATE MULTIPLIER BASED ON POLARIZATION ROTATION

Title (de)

MULTIPLIZIERER MIT VARIABLER WIEDERHOLUNGSRATE BASIERT AUF POLARISATIONSDREHUNG

Title (fr)

MULTIPLICATEUR DE TAUX DE RÉPÉTITION VARIABLE REPOSANT SUR UNE ROTATION DE POLARISATION

Publication

EP 4305715 A4 20240522 (EN)

Application

EP 21933413 A 20210324

Priority

TR 2021050262 W 20210324

Abstract (en)

[origin: WO2022203618A1] The invention relates to a method and a system for generating variable pulse repetition rate for a laser system. The invention comprises n number of cascaded controllable variable repetition rate multiplier (1) stages, where n is equal to at least one. In each repetition rate multiplier unit (2), the linearly polarized incident laser beam is transmitted through an externally controllable polarization rotator (3) followed by a polarization dependent beam splitting element (5) which either splits the beam into two orthogonally polarized beams or transmits it without splitting where either case can be selected using the polarization rotator (3). In one of the two optical paths following the polarization selective element a delay (6) equal to half the input pulse repetition period is present. A beam combining element (8) at the output of each repetition rate multiplier unit (2) combines the split beams or transmits the single beam. Thus at each multiplier stage, either the input pulse repetition rate is doubled or preserved, so that with n stages, selectable repetition rates of f0, 2f0, 4f0,…,2nf0 are generated where f0 is the repetition rate of the input beam.

IPC 8 full level

H01S 3/00 (2006.01); B23K 26/00 (2014.01); G02B 6/27 (2006.01); G02B 6/28 (2006.01)

CPC (source: EP)

G02B 6/2726 (2013.01); G02B 6/2861 (2013.01); H01S 3/005 (2013.01); G02B 6/272 (2013.01)

Citation (search report)

  • [X] US 2001021206 A1 20010913 - GROSS ABRAHAM [IL]
  • [Y] WO 2009132375 A1 20091105 - UNIV WIEN TECH [AT], et al
  • [Y] US 2019033131 A1 20190131 - KOHARA NAOKI [JP]
  • [XY] HAE-SEUNG LEE ET AL: "Optoelectronic clocking system for testing RSFQ circuits up to 20 GHz", IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, IEEE, USA, vol. 7, no. 2, 1 June 1997 (1997-06-01), pages 3301 - 3306, XP011501160, ISSN: 1051-8223, DOI: 10.1109/77.622062
  • [Y] KALAYCIOGLU HAMIT ET AL: "High-Repetition-Rate Ultrafast Fiber Lasers for Material Processing", IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, IEEE, USA, vol. 24, no. 3, 1 May 2018 (2018-05-01), pages 1 - 12, XP011673415, ISSN: 1077-260X, [retrieved on 20171127], DOI: 10.1109/JSTQE.2017.2771745
  • See also references of WO 2022203618A1

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

Designated validation state (EPC)

KH MA MD TN

DOCDB simple family (publication)

WO 2022203618 A1 20220929; EP 4305715 A1 20240117; EP 4305715 A4 20240522

DOCDB simple family (application)

TR 2021050262 W 20210324; EP 21933413 A 20210324