(19)
(11)EP 0 461 892 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
09.09.1992 Bulletin 1992/37

(43)Date of publication A2:
18.12.1991 Bulletin 1991/51

(21)Application number: 91305340.1

(22)Date of filing:  13.06.1991
(51)International Patent Classification (IPC)5H01S 3/25
(84)Designated Contracting States:
DE FR GB

(30)Priority: 13.06.1990 US 537382

(60)Divisional application:
94200898.8 / 0611016

(71)Applicant: XEROX CORPORATION
Rochester New York 14644 (US)

(72)Inventor:
  • Paoli, Thomas L.
    Los Altos, California, 94022 (US)

(74)Representative: Johnson, Reginald George et al
Rank Xerox Ltd Patent Department Parkway
Marlow Buckinghamshire SL7 1YL
Marlow Buckinghamshire SL7 1YL (GB)


(56)References cited: : 
  
      


    (54)Improved coupling structures for a phase-locked laser array


    (57) Coupling structures (40) for an index-guided laser array utilize passive transparent waveguides to improve coupling and phase-lock the array. The passive waveguides may be in the form of at least one y-coupled waveguide array (36, 38). The passive waveguides are oriented co-axially to, and are coupled to, amplification waveguides (34).







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