Title:
OPTICAL RECEIVING APPARATUS AND ADJUSTING APPARATUS
Document Type and Number:
Japanese Patent JP2019009488
Kind Code:
A
Abstract:
To minimally suppress changes in frequency characteristics in response to environmental changes.SOLUTION: An optical receiving apparatus includes a local light source 2, a dual polarization optical hybrid circuit 10a for mixing an input optical signal and a local oscillator light and separating different components of the input optical signal, a photodiode 11 for converting the optical signal separated by the hybrid circuit 10a into an electric signal, a TIA/AGC-IC 12a for amplifying the output signal of the photodiode 11, a signal processing LSI 3a for processing the amplified signal to obtain a reception signal, a temperature sensor 121 provided in the optical receiving apparatus, a storage unit 40 for storing a control parameter of a gain/frequency characteristic of the TIA/AGC-IC 12a for each temperature, and a control unit 41 for acquiring a control parameter corresponding to the temperature data measured by the temperature sensor 121 from the storage unit 40 and controlling the gain/frequency characteristic of the TIA/AGC-IC 12a.SELECTED DRAWING: Figure 1
Inventors:
ITO TOSHIHIRO
TANOBE HIROMASA
TSUNASHIMA SATOSHI
KANAZAWA SHIGERU
TANOBE HIROMASA
TSUNASHIMA SATOSHI
KANAZAWA SHIGERU
Application Number:
JP2017120538A
Publication Date:
January 17, 2019
Filing Date:
June 20, 2017
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE
International Classes:
H04B10/61; G02F2/00; H04B10/07
Domestic Patent References:
| JP2010161721A | 2010-07-22 | |||
| JP2005354485A | 2005-12-22 | |||
| JP2017005386A | 2017-01-05 | |||
| JP2016100425A | 2016-05-30 | |||
| JP2004153758A | 2004-05-27 | |||
| JP2014216979A | 2014-11-17 |
Attorney, Agent or Firm:
Shigeki Yamakawa
Yuzo Koike
Masaki Yamakawa
Yuzo Koike
Masaki Yamakawa