KR20010047146A - The optical amplifier fabricated by multi fusion package method - Google Patents

The optical amplifier fabricated by multi fusion package method Download PDF

Info

Publication number
KR20010047146A
KR20010047146A KR1019990051230A KR19990051230A KR20010047146A KR 20010047146 A KR20010047146 A KR 20010047146A KR 1019990051230 A KR1019990051230 A KR 1019990051230A KR 19990051230 A KR19990051230 A KR 19990051230A KR 20010047146 A KR20010047146 A KR 20010047146A
Authority
KR
South Korea
Prior art keywords
optical
optical amplifier
connection points
coupler
isolator
Prior art date
Application number
KR1019990051230A
Other languages
Korean (ko)
Inventor
최영복
Original Assignee
이계철
한국전기통신공사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 이계철, 한국전기통신공사 filed Critical 이계철
Priority to KR1019990051230A priority Critical patent/KR20010047146A/en
Publication of KR20010047146A publication Critical patent/KR20010047146A/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
    • G02B6/2821—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using lateral coupling between contiguous fibres to split or combine optical signals
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/255—Splicing of light guides, e.g. by fusion or bonding
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/27—Optical coupling means with polarisation selective and adjusting means
    • G02B6/2746—Optical coupling means with polarisation selective and adjusting means comprising non-reciprocal devices, e.g. isolators, FRM, circulators, quasi-isolators
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29346—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by wave or beam interference
    • G02B6/29361—Interference filters, e.g. multilayer coatings, thin film filters, dichroic splitters or mirrors based on multilayers, WDM filters

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Lasers (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE: An optical fiber type optical amplifier fabricated by a collective connection packaging method is provided which collectively connects various fusing connection points in an arrangement capable of ribbon connecting to reduce the number of fusing connection points, thereby simplifying fabrication processes and decreasing packaging size. CONSTITUTION: An optical amplifier includes a front tap optical coupler(12) connected to an input port(11), a front optical isolator(13), and a WDM optical coupler(14) for combining an excited beam and a signal beam with each other to send the combined beam to an optical amplification fiber(15) serving as an amplification medium. The optical amplifier further has a back optical isolator(16) for preventing reverse flowing of an optical signal together with the front optical isolator, a gain smoothing filter(17) for smoothing a gate, a back tap coupler(18) for monitoring a light source, and an output port(19). Connection points among the above constituent elements are arranged in a ribbon form to be collectively connected, to minimize the number of fusing connection points(20).

Description

일괄접속 패키징 방법으로 제작된 광섬유형 광증폭기{THE OPTICAL AMPLIFIER FABRICATED BY MULTI FUSION PACKAGE METHOD}Fiber Optic Optical Amplifier Manufactured by Batch-Packed Packaging Method {THE OPTICAL AMPLIFIER FABRICATED BY MULTI FUSION PACKAGE METHOD}

본 발명은 광통신시스템에 사용되는 광증폭기에 관한 것으로, 특히 각 부품들간의 융착접속점의 수를 줄여 패키징의 제작을 간편화 하고, 크기를 소형, 경량화시킨 광섬유형 광증폭기에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical amplifier for use in an optical communication system, and in particular, to simplify the fabrication of packaging by reducing the number of fusion splicing points between components and to reduce the size and weight of an optical fiber type optical amplifier.

최근들어, 가입자망의 고속화를 위해 가입자 댁내까지 광통신망을 연결하는 광가입자망에 대한 연구가 활발하게 진행되고 있으며, 일부 지역에서는 광가입자망의 보급화를 위해 광가입자 시험망이 구축, 운영되고 있다.Recently, research has been actively conducted on the optical subscriber network connecting the optical communication network to the subscriber's premises for the high speed of the subscriber network, and in some regions, the optical subscriber test network has been established and operated to spread the optical subscriber network. .

이러한 광가입자망을 구축하는데 있어서는 디지탈화된 전기적 신호를 임의의 파장대의 광신호로 변환하여 광섬유로 전송하고 광섬유를 통해 수신되는 임의의 파장대의 광신호를 검출하여 디지탈화된 전기적 신호로 역변환하는 광송수신기와, 광신호 또는 신호광을 목표로하는 임의의 레벨로 증폭하는 광증폭기의 요구가 필수적이다.In constructing such an optical subscriber network, an optical transmitter and receiver which converts a digitalized electrical signal into an optical signal in an arbitrary wavelength band and transmits it to an optical fiber, detects an optical signal in an arbitrary wavelength band received through the optical fiber, and inverts it into a digitalized electrical signal. Therefore, there is a need for an optical amplifier that amplifies an optical signal or a signal light to an arbitrary level.

어븀 도핑된 광증폭기(Erbium doped fiber amplifier)는 1.55μm 파장대에서 광섬유가 지니고 있는 저 손실의 중요성과 광섬유의 손실을 근본적으로 해결할 수 있는 이상적인 광증폭기라 할 수 있다. 이러한 EDF 광증폭기는 신호광의 전송거리를 수십km에서 수백km까지로 확장할 수 있고, 전송속도에 관계없이 신호광을 증폭할 수 있으며, 광대역에 걸쳐서 고르게 신호광을 증폭할 수 있기 때문에 파장 분할 다중화(WDM) 전송도 가능하다. 또한, 광증폭기의 고출력(예를 들면, 20dBm)은 광CATV 분배기와 PDS(Passive Double Star)에 의한 광가입자망의 구성을 매우 용이하게 할 수 있게 해 준다.Erbium doped fiber amplifiers are an ideal optical amplifier that can fundamentally solve the loss of fiber and the importance of low loss in the 1.55μm wavelength. These EDF optical amplifiers can extend the transmission distance of the signal light from tens of kilometers to hundreds of kilometers, amplify the signal light regardless of the transmission speed, and evenly spread the signal light over a wide bandwidth. ) Transmission is also possible. In addition, the high power of the optical amplifier (for example, 20dBm) makes it very easy to configure the optical subscriber network by the optical CATV splitter and Passive Double Star (PDS).

도 1은 일반적인 광증폭기의 구성을 나타낸 것이다.1 shows a configuration of a general optical amplifier.

도시된 바와 같이, 광증폭기는 입력단자(1)에 연결되는 전단 Tap 광커플러(2), 전단 Tap 커플러(2)와 WDM 광커플러(4) 사이에 있는 전단 광아이솔레이터(3), 여기광과 신호광을 합쳐서 광증폭 광섬유(5)로 보내주는 기능을 하는 WDM 광커플러(4), 증폭매질인 광증폭 광섬유(EDF: 5), 후단 광아이솔레이터(6), 이득을 평탄화시키는 이득 평탄화 필터(7), 광원 감시용 후단 Tap 커플러(8)와 출력단자(9) 등으로 구성되어 있다.As shown, the optical amplifier includes a shear Tap optocoupler 2 connected to the input terminal 1, a shear optoisolator 3 between the shear Tap coupler 2 and the WDM optocoupler 4, excitation light and the like. WDM optocoupler 4 which combines the signal light and sends it to optical amplification optical fiber 5, optical amplification optical fiber (EDF: 5), rear end optical isolator 6, gain flattening filter for flattening gain (7) ), And a rear end tap coupler (8) and an output terminal (9) for light source monitoring.

이러한 종래의 광증폭기는 각각의 구성부품을 도면에 표시된 각 융착접속지점(x)에서 하나씩 서로 융착접속하는 방식으로 제작된다. 따라서, 각 단자들간의 연결작업을 여러회 반복하게 됨으로써 광증폭기 제작의 작업성을 저하시키게 되고, 각 소자의 연결접속점에서 소자크기와 비슷한 보강재를 사용하여 보강해야하므로 이로 인해 광증폭기 패키징의 크기가 커지고, 광섬유들의 여장처리 작업이 복잡하게 뒤섞여져 신뢰성을 저하시키는 결과를 야기한다.Such a conventional optical amplifier is manufactured in such a way that each component is fusion-spliced with each other one by one at each fusion splicing point x shown in the drawing. Therefore, the connection between each terminal is repeated several times, thereby reducing the workability of the optical amplifier fabrication, and the size of the optical amplifier packaging is increased due to the reinforcement using a reinforcement similar to the element size at the connection point of each device. It becomes large, and the dressing process of the optical fibers is complicated to mix, resulting in a decrease in reliability.

이러한 원인은 마이크로밴딩 손실을 막기 위해서는 여장처리되는 광섬유의 허용곡률반경이 유지되어야 하는데 각 부품마다 광섬유의 여장처리 길이가 다르고, 또한 융착접속점 수 만큼 보강재를 사용하게 됨으로써 발생하게 된다.This cause is caused by the allowable curvature radius of the optical fiber to be treated in order to prevent the microbanding loss, which is caused by the use of reinforcing material as the length of the optical fiber for each component and the number of fusion splicing point.

본 발명은 상술한 바와 같은 종래 기술의 문제점을 해소하기 위한 것으로, 여러 지점의 융착접속 지점들을 리본접속이 가능한 배열로서 다심화하여 일괄접속되게 함으로써 융착접속점의 수를 줄여 제조공정을 단순화하고, 패키징의 크기를 줄일 수 있게 한 일괄접속 패키징 방법으로 제작된 광섬유형 광증폭기를 제공하는데 그 목적이 있다.The present invention is to solve the problems of the prior art as described above, by simplifying the manufacturing process by reducing the number of fusion splicing points by multiplexing the fusion splicing points of the multiple points as an array capable of ribbon connection, collectively connected It is an object of the present invention to provide an optical fiber type optical amplifier manufactured by a batch connection packaging method capable of reducing the size of the circuit.

상술한 목적을 달성하기 위한 본 발명은, 입력단자에 연결되는 전단 Tap 광커플러와, 전단 광아이솔레이터와, 여기광과 신호광을 합쳐서 광증폭 광섬유로 보내주는 WDM 광커플러와, 증폭매질인 광증폭 광섬유와, 전단 광아이솔레이터와 더불어 광신호의 역류를 방지하는 후단 광아이솔레이터와, 이득을 평탄화시키는 이득 평탄화 필터와, 광원 감시용 후단 Tap 커플러 및 출력단자 등을 구비하는 광증폭기에 있어서, 상기 각 구성부품간의 연결 지점들을 리본형태의 배열로써 다심화시키고 이를 일괄접속 함으로써 융착접속점의 수를 최소화 한 것을 특징으로 한다.The present invention for achieving the above object, the front end tap optocoupler connected to the input terminal, the front end optical isolator, the WDM optical coupler which combines the excitation light and the signal light and sends the optical amplification optical fiber, an optical amplification medium And an optical amplifier including a front optical isolator and a rear stage optical isolator for preventing the reverse flow of the optical signal, a gain flattening filter for flattening the gain, a rear end tap coupler and an output terminal for monitoring the light source, and the like. It is characterized by minimizing the number of fusion splicing points by multiplying the connection points between the cores in a ribbon arrangement and collectively connecting them.

도 1은 일반적인 광증폭기의 접속 구성도,1 is a connection configuration diagram of a general optical amplifier,

도 2는 본 발명에 따른 광증폭기의 접속 개념도,2 is a conceptual diagram of connection of an optical amplifier according to the present invention;

도 3은 본 발명에 따른 광증폭기의 접속 및 배열을 나타내는 평면도.3 is a plan view showing the connection and arrangement of the optical amplifier according to the present invention;

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

11 ; 신호광 입련단자 12 ; 전단 Tap 광커플러11; Signal light input terminal 12; Shear Tap Optocouplers

13 ; 전단 광아이솔레이터 14 ; WDM 광커플러13; Shear photoisolator 14; WDM Optocouplers

15 ; 광증폭 광섬유 16 ; 후단 광아이솔레이터15; Optically amplified optical fiber 16; Rear end isolator

17 ; 이득평탄형 필터 18 ; 후단 Tap 광커플러17; Gain flat filter 18; Rear Tap Optocoupler

19 ; 출력단자 20 ; 다심 융착접속부19; Output terminal 20; Multi-core fusion splicing

이와 같은 본 발명의 특징적인 구성 및 이에 따른 작용효과는 첨부된 도면을 참조한 실시예의 상세한 설명을 통해 더욱 명확해 질 것이다.Such a characteristic configuration of the present invention and its effects will be more apparent through the detailed description of the embodiments with reference to the accompanying drawings.

도 2는 본 발명에 따른 광증폭기의 접속 개념도이고, 도 3은 본 발명에 따른 광증폭기의 접속 및 배열 구성을 나타낸 평면도이다.2 is a conceptual diagram of the connection of the optical amplifier according to the present invention, Figure 3 is a plan view showing the connection and arrangement of the optical amplifier according to the present invention.

본 발명에 따른 광증폭기는 종래의 광증폭기와 동일한 구성부품으로 이루어진다. 즉, 입력단자(11)에 연결되는 전단 Tap 광커플러(12), 전단 Tap 커플러(12)와 WDM 광커플러(14) 사이의 전단 광아이솔레이터(13), 여기광과 신호광을 합쳐서 광증폭 광섬유(15)로 보내주는 WDM 광커플러(14), 증폭매질인 광증폭 광섬유(15), 전단 광아이솔레이터(13)와 더불어 광신호의 역류를 방지하는 후단 광아이솔레이터(16), 이득을 평탄화시키는 이득 평탄화 필터(17), 광원 감시용 후단 Tap 커플러(18)와 출력단자(19) 등을 포함하는 구성으로 되어있다.The optical amplifier according to the present invention consists of the same components as a conventional optical amplifier. That is, the front end optocoupler 12 connected to the input terminal 11, the front end isolator 13 between the front end tap coupler 12 and the WDM optocoupler 14, the excitation light and the signal light are combined to form an optical amplification optical fiber ( 15) the WDM optocoupler 14, the amplification medium, the optical amplification fiber 15, the front end isolator 13, and the rear end isolator 16 to prevent the backflow of the optical signal, and the gain flattening gain. The filter 17, the rear end Tap coupler 18 for light source monitoring, the output terminal 19, etc. are comprised.

따라서, 전단 광아이솔레이터(13)를 통해 신호광원으로부터 입사되는 신호광과 여기광원 구동기로부터 발생하여 입사되는 여기광은 WDM 광커플러(14)를 통해 합쳐진 후 광증폭 광섬유(15)로 전달되고, 광증폭 광섬유(15)를 통해 소정 레벨로 증폭된 신호광은 후단 광아이솔레이터(16)를 통해 이득평탄화 필터(17)로 전달된 뒤, 필터(17)에서 증폭된 신호광의 이득을 평탄화하여 최종적으로 출력단(19)으로 보내지게 된다.Therefore, the signal light incident from the signal light source through the shear optical isolator 13 and the excitation light generated from the excitation light source driver are combined through the WDM optical coupler 14 and then transferred to the optical amplification optical fiber 15, and the optical amplification is performed. The signal light amplified to the predetermined level through the optical fiber 15 is transmitted to the gain leveling filter 17 through the rear end optical isolator 16, and then flattens the gain of the signal light amplified by the filter 17 to finally output the output 19 Will be sent).

이와 같은 본 발명에 따른 광증폭기는 도 2 내지 도 3에 도시한 바와 같이, 각각의 구성부품 및 그 연결 지점들을 리본형태의 배열로써 적층 다심화시키고 이를 한 번에 일괄접속하는 방법으로 제작된다. 따라서, 융착접속지점의 개수를 최소화시킬 수 있게 된다.2 to 3, the optical amplifier according to the present invention is manufactured by a method of stacking and multiplying each component and its connection points in a ribbon-like arrangement and collectively connecting them at once. Therefore, the number of fusion splicing points can be minimized.

즉, 종래의 광증폭기에서는 각각의 구성부품을 각 융착접속지점에서 하나씩 서로 융착접속하는 방식으로 작업이 이루어짐으로써 각 단자들간의 융착접속작업이 여러회 반복되었으나, 본 발명에 의하면 광섬유의 배열구조를 다심화하여 융착지점들을 한 곳에 모이게 한 뒤 이들을 한 번에 모두 접속함으로써 제조공정을 단순화 할 수 있게 된다.That is, in the conventional optical amplifier, the fusion splicing operation between the terminals has been repeated several times by performing the fusion splicing operation of each component one by one at each fusion splicing point. By severing the convergence points together and connecting them all at once, the manufacturing process can be simplified.

위에서 설명한 바와 같이 본 발명은 여러 지점의 융착접속 지점들을 리본형태의 배열로써 다심화하고 이들을 한 번에 일괄접속되게 한 것으로, 제조공정의 단순화에 의한 광증폭기 제조의 생산성을 향상시키고, 패키징의 크기를 줄여 신뢰성있고 저렴한 광증폭기를 제조 할 수 있게 된다.As described above, the present invention is to multiply the fusion splicing points of a plurality of points in an array of ribbons and to connect them at once, thereby improving the productivity of the optical amplifier manufacturing by simplifying the manufacturing process, and the size of the packaging. It is possible to manufacture a reliable and inexpensive optical amplifier by reducing the cost.

Claims (1)

입력단자에 연결되는 전단 Tap 광커플러와, 전단 광아이솔레이터와, 여기광과 신호광을 합쳐서 광증폭 광섬유로 보내주는 WDM 광커플러와, 증폭매질인 광증폭 광섬유와, 전단 광아이솔레이터와 더불어 광신호의 역류를 방지하는 후단 광아이솔레이터와, 이득을 평탄화시키는 이득 평탄화 필터와, 광원 감시용 후단 Tap 커플러 및 출력단자 등을 구비하는 광증폭기에 있어서,A reverse tap of the optical signal, together with a front-end tap optocoupler connected to the input terminal, a front-end optical isolator, a WDM optical coupler that combines excitation light and signal light and sends it to an optical amplification fiber, an optical amplification fiber as an amplification medium, and a shear optical isolator In the optical amplifier including a rear stage optical isolator for preventing the gain, a gain flattening filter for flattening the gain, a rear end tap coupler for monitoring the light source, an output terminal, and the like, 상기 각 구성부품간의 연결 지점들을 리본형태의 배열로써 다심화시키고 이를 일괄접속 함으로써 융착접속점의 수를 최소화 한 것을 특징으로 하는 일괄접속 패키징 방법으로 제작된 광섬유형 광증폭기Optical fiber type optical amplifier fabricated by the batch connection packaging method characterized by minimizing the number of fusion splicing points by multiplying the connection points between the components in a ribbon-like arrangement and collectively connecting them.
KR1019990051230A 1999-11-18 1999-11-18 The optical amplifier fabricated by multi fusion package method KR20010047146A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019990051230A KR20010047146A (en) 1999-11-18 1999-11-18 The optical amplifier fabricated by multi fusion package method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019990051230A KR20010047146A (en) 1999-11-18 1999-11-18 The optical amplifier fabricated by multi fusion package method

Publications (1)

Publication Number Publication Date
KR20010047146A true KR20010047146A (en) 2001-06-15

Family

ID=19620620

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019990051230A KR20010047146A (en) 1999-11-18 1999-11-18 The optical amplifier fabricated by multi fusion package method

Country Status (1)

Country Link
KR (1) KR20010047146A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120101828A (en) * 2011-03-07 2012-09-17 주식회사 라이콤 Miniaturized optical fiber amplifier

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6183504A (en) * 1984-10-01 1986-04-28 Nec Corp Connecting box for optical fiber cable
KR910004713A (en) * 1989-08-24 1991-03-29 클라우스 댄너, 귄터 슈마허 Method for preparing polyarylene sulfide
KR19990017105A (en) * 1997-08-21 1999-03-15 이계철 Multistage Optocoupler Packaging Method
JPH11211929A (en) * 1998-01-27 1999-08-06 Sumitomo Electric Ind Ltd Optical fiber connector and production thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6183504A (en) * 1984-10-01 1986-04-28 Nec Corp Connecting box for optical fiber cable
KR910004713A (en) * 1989-08-24 1991-03-29 클라우스 댄너, 귄터 슈마허 Method for preparing polyarylene sulfide
KR19990017105A (en) * 1997-08-21 1999-03-15 이계철 Multistage Optocoupler Packaging Method
JPH11211929A (en) * 1998-01-27 1999-08-06 Sumitomo Electric Ind Ltd Optical fiber connector and production thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120101828A (en) * 2011-03-07 2012-09-17 주식회사 라이콤 Miniaturized optical fiber amplifier

Similar Documents

Publication Publication Date Title
US5995259A (en) Bidirectional optical telecommunication system comprising a bidirectional optical amplifier
CA2020759C (en) Erbium-doped fiber amplifier coupling device
AU699315B2 (en) Amplified telecommunication system for wavelength-division multiplexing transmissions capable of limiting variations in the output power
EP0503849A2 (en) Photonic cross-connect switch
CN100375416C (en) Radiation power balancer
CN108834005B (en) Passive optical fiber network system with adjustable power and control method thereof
Jaouen et al. Eight-wavelength Er-Yb doped amplifier: combiner/splitter planar integrated module
US5673142A (en) Optical amplifier with internal input signal monitoring tap
JPH10303823A (en) Optical signal amplification and transmission system
US5077817A (en) Fiber star amplifier coupler and method of making same
US7020168B2 (en) High power multi-frequency laser
CN1190849A (en) Optical switch selector
US20020159138A1 (en) Access device for pump source in cascade erbium-doped fiber amplification
KR20010047146A (en) The optical amplifier fabricated by multi fusion package method
JP2694014B2 (en) Bidirectional optical amplifier transmission circuit
JP2740676B2 (en) Optical amplification transmission circuit
US6417962B1 (en) Optical waveguide amplifier optical service channel accessor device and method of making
JP2732746B2 (en) Monitoring method of input / output optical power of optical amplifier
Sugimoto Recent progress in Bi-EDF technologies
JP2744471B2 (en) Optical amplification transmission circuit
CN108767635A (en) Niobic acid lithium doping silica fibre Raman optical amplification device
Du et al. FIFO-less Core-pumped Multicore Erbium-doped Fiber Amplifier with Hybrid Passive Components
CN209183941U (en) One kind is based on As-S sulphur system&#39;s optical fiber and the cascade fiber amplifier of telluro optical fiber
CN107015314A (en) A kind of EDFA micro-optics hybrid device preparation method and device
CN100487507C (en) Gain flattening utilizing a two-stage erbium-based amplifier

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application