Invention Grant
US08599233B2 Vertical cavity surface emitting laser element, vertical cavity surface emitting laser array, optical scanning device, and image forming apparatus 有权
垂直腔表面发射激光元件,垂直腔表面发射激光器阵列,光学扫描装置和成像装置

  • Patent Title: Vertical cavity surface emitting laser element, vertical cavity surface emitting laser array, optical scanning device, and image forming apparatus
  • Patent Title (中): 垂直腔表面发射激光元件,垂直腔表面发射激光器阵列,光学扫描装置和成像装置
  • Application No.: US13147239
    Application Date: 2009-12-22
  • Publication No.: US08599233B2
    Publication Date: 2013-12-03
  • Inventor: Katsunari Hanaoka
  • Applicant: Katsunari Hanaoka
  • Applicant Address: JP Tokyo
  • Assignee: Ricoh Company, Ltd.
  • Current Assignee: Ricoh Company, Ltd.
  • Current Assignee Address: JP Tokyo
  • Agency: Cooper & Dunham LLP
  • Priority: JP2009-065667 20090318; JP2009-217914 20090918
  • International Application: PCT/JP2009/071854 WO 20091222
  • International Announcement: WO2010/106720 WO 20100923
  • Main IPC: B41J2/45
  • IPC: B41J2/45 H01S5/00
Vertical cavity surface emitting laser element, vertical cavity surface emitting laser array, optical scanning device, and image forming apparatus
Abstract:
A disclosed vertical cavity surface emitting laser element includes a substrate, a laminated body sandwiching a semiconductor active layer with an upper reflecting mirror and a lower reflecting mirror, a lower electrode, and an upper electrode. The laser element emits laser light in a direction perpendicular to the surface of the substrate when an electric current is supplied between the upper electrode and the lower electrode. The laser element further includes a selective oxidation layer in the upper reflecting mirror having a current blocking structure made of an oxidized region and an unoxidized region, and a detectable portion formed on a side surface of a mesa structure shaped by the upper reflecting mirror including the selective oxidation layer and the active layer, thereby enabling detecting the position of the selective oxidation layer from a top of the laminated body in a depth direction of the laminated body.
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