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Title:
LIGHT RECEIVING ELEMENT AND OPTICAL RECEIVER
Document Type and Number:
Japanese Patent JP2005183538
Kind Code:
A
Abstract:

To provide a light receiving element of a simplified constitution for obtaining a signal for controlling the APD avalanche amplification factor, and to provide an optical receiver having the same.

The optical receiver 1 has an optical signal receiver 3 and a controlling unit 5, and the signal receiver 3 has a light receiving element 8. The light receiving element 8 has an APD 10 and, on the surface 111 of the APD 10 except on the light receiving region 11, a photoconductor 13 is formed with a passivation film 115 in between. A signal for controlling the avalanche amplification factor of the APD 10 is obtained from the photoconductor 13, and this simplifies the constitution. Furthermore, since the photoconductor 13 outputs an output current I2 high in linearity in response to a very weak light, the output current I2 for controlling the avalanche amplification factor of the APD 10 is high in precision.


Inventors:
Kuhara, Miki
Nishie, Mitsuaki
Hayashi, Shigero
Application Number:
JP2003000419717
Publication Date:
July 07, 2005
Filing Date:
December 17, 2003
Export Citation:
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Assignee:
SUMITOMO ELECTRIC IND LTD
International Classes:
H01L31/107; H01J40/14; H01L31/10; H03F3/08; H04B10/07; H04B10/40; H04B10/50; H04B10/60; (IPC1-7): H01L31/107; H01L31/10; H04B10/02; H04B10/28
Attorney, Agent or Firm:
長谷川 芳樹
塩田 辰也
寺崎 史朗
柴田 昌聰