Device and method for integrated optical measurement

Patent metadata

Field	Value
Publication number	US-2018252579-A1
Application number	US-201715825303-A
Country	US
Kind code	A1
Filing date	Nov 29, 2017
Priority date	Mar 6, 2017
Publication date	Sep 6, 2018
Grant date	—

Abstract

An integrated optical measurement apparatus includes: an optical signal transmission unit varying a wavelength of an optical signal to be transmitted and controlling power of the optical signal such that the wavelength is varied to be output to the outside; an optical signal receiving unit measuring power and a wavelength from the optical signal input from the outside; and a controller controlling the optical signal transmission unit and the optical signal receiving unit.

First claim

What is claimed is:

1 . An integrated optical measurement apparatus transmitting an optical signal and processing a received optical signal, comprising:
an optical signal transmission unit varying a wavelength of the optical signal to be transmitted and controlling power of the optical signal such that the wavelength is varied to be output to the outside; an optical signal receiving unit measuring power and a wavelength from the optical signal input from the outside; and a controller controlling the optical signal transmission unit and the optical signal receiving unit.

2 . The integrated optical measurement apparatus of claim 1 , wherein
the optical signal transmission unit includes: at least one wavelength tunable transmission unit varying the wavelength of the optical signal to be transmitted; a combination and distribution unit combining at least one optical signal respectively output from the wavelength tunable transmission unit and having the varied wavelength; an amplification and power controlling unit controlling power of the optical signal combined by the combination unit; and an output unit outputting a signal of which the power is controlled.

3 . The integrated optical measurement apparatus of claim 2 , wherein
the optical signal transmission unit further includes a driving board unit controlling driving of at least one wavelength tunable transmission unit to provide the corresponding wavelength depending on wavelength information received from the controller.

4 . The integrated optical measurement apparatus of claim 3 , wherein
the at least one wavelength tunable transmission unit respectively includes at least one diode chip, and the driving board unit changes a current flowing to the at least one diode chip depending on the wavelength information to vary the wavelength of the optical signal.

5 . The integrated optical measurement apparatus of claim 2 , wherein
the optical signal transmission unit further includes a power controller controlling the amplification and power controlling unit depending on the control of the controller.

6 . The integrated optical measurement apparatus of claim 2 , wherein
the at least one wavelength tunable transmission unit is implemented as a transistor outline (TO)-CAN package or a mini flat package.

7 . The integrated optical measurement apparatus of claim 2 , wherein
the optical signal transmission unit further includes a wavelength locker fixing the wavelength of the input optical signal, and the combination and distribution unit distributes the combined optical signals, and then outputs one optical signal to the amplification and power controlling unit and outputs the other optical signal to the wavelength locker.

8 . The integrated optical measurement apparatus of claim 1 , wherein
the optical signal receiving unit includes: a first optical separator branching the received optical signal; a power measuring unit receiving one optical signal output from the first optical separator to be converted into an electrical signal; a power control board unit measuring the power of the electrical signal output from the power measuring unit; at least one linear transmission filter generating a power change for each wavelength from the other optical signal output from the first optical separator; at least one wavelength measuring unit converting the optical signal passing through the at least one linear transmission filter into the electrical signal; and a wavelength control board unit measuring the wavelength from the electrical signal output from the at least one wavelength measuring unit.

9 . The integrated optical measurement apparatus of claim 8 , wherein
the optical signal receiving unit further includes at least one second optical separator branching the other optical signal and outputting one branched optical signal to the corresponding linear transmission filter, and the at least one second optical separator outputs the other branched optical signal to a second optical separator that is positioned next.

10 . The integrated optical measurement apparatus of claim 1 , wherein
the optical signal receiving unit includes: an optical distributor outputting the optical signal respectively received through the plurality of output ports; a power measuring unit connected to a first output port among the plurality of output ports and receiving the optical signal output through the second output port to be converted into the electrical signal; a power control board unit measuring power from the electrical signal output from the power measuring unit; at least one linear transmission filter connected to a second output port except for the first output port among the plurality of output ports and generating a power change for each wavelength from the optical signal output from the second output port; at least one wavelength measuring unit converting the optical signal passing through the at least one linear transmission filter into the electrical signal; and a wavelength control board unit measuring the wavelength from the electrical signal output from the at least one wavelength measuring unit.

11 . The integrated optical measurement apparatus of claim 1 , further comprising
an interface unit providing an interface with an external device according to the control of the controller.

12 . The integrated optical measurement apparatus of claim 1 , further comprising
a display unit executing a display operation according to the control of the controller.

13 . The integrated optical measurement apparatus of claim 1 , wherein
at least part of the optical signal receiving unit is implemented as a TO-CAN package or a mini flat package.

14 . An integrated optical measurement method of measuring an optical signal from an integrated optical measurement apparatus, comprising:
varying a wavelength of an optical signal to be transmitted in an optical signal transmission unit of the integrated optical measurement according to wavelength information received from a controller; controlling and outputting power of the optical signal having a wavelength that is varied in the optical signal transmission unit; and measuring power and a wavelength from the optical signal input from the outside in an optical signal receiving unit of the integrated optical measurement apparatus.

15 . The integrated optical measurement method of claim 14 , wherein
the measuring includes: dividing the input optical signal into a plurality of optical signals; measuring the power from one optical signal among the plurality of optical signals; and measuring the wavelength from at least one remaining optical signal among the plurality of optical signals.

16 . The integrated optical measurement method of claim 15 , wherein
the measuring of the wavelength includes: measuring a phototransmission amount of the at least one remaining optical signal by using a linear transmission filter changing a phototransmission amount for each wavelength; and measuring the wavelength from the phototransmission amount.

17 . The integrated optical measurement method of claim 14 , wherein
the optical signal transmission unit includes at least one laser diode chip, the varying includes varying the wavelength of the optical signal by changing a current flowing to the at least one laser diode chip according to the wavelength information.

18 . The integrated optical measurement method of claim 14 , wherein
the outputting includes: distributing the optical signal having the varied wa

Assignees

• Electronics & Telecommunications Res Inst

Inventors

• Kang Hyun Seo
• Kim Jeong Eun
• Koh Jaisang
• Kim Keo-Sik
• Kim Sung Chang
• Kim Hee Seung
• Ryu Ji Hyoung
• Park Hyoungjun
• Son Dong Hoon
• Yeo Chan Il
• Heo Young Soon

Classifications

• G02B6/12007

  forming wavelength selective elements, e.g. multiplexer, demultiplexer · CPC title

• G01J3/0218

  using optical fibers · CPC title

• G01J1/4257

  applied to monitoring the characteristics of a beam, e.g. laser beam, headlamp beam (monitoring arrangements for lasers in general H01S3/0014) · CPC title

• G01J3/0286

  Constructional arrangements for compensating for fluctuations caused by temperature, humidity or pressure, or using cooling or temperature stabilization of parts of the device; Controlling the atmosphere inside a spectrometer, e.g. vacuum · CPC title

• G01J3/027

  Control of working procedures of a spectrometer; Failure detection; Bandwidth calculation · CPC title