(19)
(11)EP 2 346 123 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
24.01.2018 Bulletin 2018/04

(43)Date of publication A2:
20.07.2011 Bulletin 2011/29

(21)Application number: 11250017.8

(22)Date of filing:  10.01.2011
(51)International Patent Classification (IPC): 
H01S 5/183(2006.01)
H01S 5/343(2006.01)
H01S 5/42(2006.01)
B41J 2/435(2006.01)
(84)Designated Contracting States:
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 States:
BA ME

(30)Priority: 15.01.2010 JP 2010006457
27.07.2010 JP 2010167704

(71)Applicant: Ricoh Company, Ltd.
Tokyo 143-8555 (JP)

(72)Inventors:
  • Morimasa, Kaminishi
    Tokyo 143-8555 (JP)
  • Shunichi, Sato
    Tokyo 143-8555 (JP)

(74)Representative: J A Kemp 
14 South Square Gray's Inn
London WC1R 5JJ
London WC1R 5JJ (GB)

  


(54)Surface emitting laser element, surface emitting laser array, optical scanning apparatus, and image forming apparatus


(57) A surface emitting laser element includes a p-side spacer layer (106); an n-side spacer layer (104); and an active layer (105) disposed between the p-side spacer layer (106) and the n-side spacer layer (104). The p-side spacer layer (106) includes an undoped region adjacent to the active layer (105) in which no p-type dopant is contained. The entire n-side spacer layer (104) is doped with an n-type dopant.







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