EP0903882A3

Stable wavelenght division multiplex ring network

Abstract

We have recognized that in a Wavelength Division Multiplex (WDM) ring network with a closed loop, the possibility of lasing at Amplified Spontaneous Emissions (ASE) wavelengths exists. In accordance with the present invention, we provide a technique for protecting against lasing in a WDM ring network comprising a plurality of serially connected node links, each node link including a segment of optical fiber and an access node site for adding or dropping one or more active wavelength channels to a transmission bandwidth of the network. The protection means changes the optical transmission characteristics of the transmission bandwidth of the network to ensure that the network loop gain at any wavelength is always less than the network loop loss.

EP0903882A3, drawing sheet 1 — Sheet 1 of 1

Term

Term ended

Projected expiry passed 8 September 2018, 8 years ago.

1 sheet

Sheet 1

Every citation, both waysCites: the store holds 4 of 5

Citations
Document	Relation	Office	Category	Cited during	Relevant claims
EP0647994A1	Cites	European Patent Office (EPO)	A	Search report	6
EP0695050A1	Cites	European Patent Office (EPO)	A	Search report	11,12
US5510926A	Cites	United States of America	Y	Search report	2,5,15,16
WO9632787A1	Cites	World Intellectual Property Organization (WIPO)	X	Search report	1,3,6-10,13,14

6 members in 3 offices

This recordMember, by publication datePriority claim

Priority claims5

Priority claims
Document	Office	Kind	Date
929926	United States of America	–	1997-09-15
92992697	United States of America	A	1997-09-15
92992697	United States of America	A	1997-09-15
929926	–	–	–
US19970929926	–	–	–

Members6

Family members, oldest first
Document	Office	Kind
EP0903882A2	European Patent Office (EPO)	A2	1999-03-24
JPH11145910A	Japan	A	1999-05-28
US6025941A	United States of America	A	2000-02-15
JP3466485B2	Japan	B2	2003-11-10
EP0903882A3This record	European Patent Office (EPO)	A3	2005-01-19
EP0903882B1	European Patent Office (EPO)	B1	2013-11-06

40 legal events, as 4 offices reported them to INPADOC

Over the term

Point at a mark for the event

Events

Legal events, newest first
	Event	Code	Office
2017-07-31	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2017-07-31	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2017-07-31	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2017-06-30	Notification of lapseLapsedST	ST	FR
2017-05-24	Gb: european patent ceased through non-payment of renewal feeCeasedGBPC	GBPC	EP
2017-04-01	Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal feeWithdrawnR119	R119	DE
2015-11-30	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2015-10-30	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2015-10-30	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2015-09-22	Fee paymentPLFP	PLFP	FR
2014-11-28	Lien (pledge) cancelledRG	RG	FR
2014-11-20	No opposition filed against granted patent, or epo opposition proceedings concluded without decisionGrantedR097	R097	DE
2014-10-15	No opposition filedOpposition26N	26N	EP
2014-09-12	No opposition filed within time limitOppositionORIGINAL CODE: 0009261PLBE	PLBE	EP
2014-09-12	Information on the status of an ep patent application or granted ep patentGrantedSTATUS: NO OPPOSITION FILED WITHIN TIME LIMITSTAA	STAA	EP
2014-08-20	Party data changed (patent owner data changed or rights of a patent transferred)RAP2	RAP2	EP
2014-08-07	No opposition filed against granted patent, or epo opposition proceedings concluded without decisionGrantedR097	R097	DE
2014-04-11	Lien (pledge) constitutedGC	GC	FR
2013-12-24	Dpma publication of mentioned ep patent grantGrantedR096	R096	DE
2013-11-06	Designated contracting statesAK	AK	EP
2013-11-06	European patent grantedGrantedFG4D	FG4D	GB
2013-10-23	Party data changed (applicant data changed or rights of an application transferred)RAP1	RAP1	EP
2013-10-04	(expected) grantORIGINAL CODE: 0009210GRAA	GRAA	EP
2013-10-02	Information provided on other rights and legal means of executionDE FR GB111Z	111Z	EP
2013-09-18	Grant fee paidORIGINAL CODE: EPIDOSNIGR3GRAS	GRAS	EP
2013-07-03	Intention to grant announcedINTG	INTG	EP
2013-07-03	Information provided on ipc code assigned before grantRIC1	RIC1	EP
2013-07-03	Information provided on ipc code assigned before grantRIC1	RIC1	EP
2013-06-07	Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOSNIGR1GRAP	GRAP	EP
2013-03-27	Party data changed (applicant data changed or rights of an application transferred)RAP1	RAP1	EP
2009-09-02	Party data changed (applicant data changed or rights of an application transferred)RAP3	RAP3	EP
2007-01-31	First examination report despatched17Q	17Q	EP
2005-10-05	Designation fees paidAKX	AKX	EP
2005-09-07	Request for examination filed17P	17P	EP
2005-01-19	Designated contracting statesAK	AK	EP
2005-01-19	Request for extension of the european patentAX	AX	EP
2004-12-03	Search report despatchedORIGINAL CODE: 0009013PUAL	PUAL	EP
1999-03-24	Designated contracting statesAK	AK	EP
1999-03-24	Request for extension of the european patentAL;LT;LV;MK;RO;SIAX	AX	EP
1999-02-05	Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI	PUAI	EP

Stable wavelenght division multiplex ring network

Abstract

Term

Priority claims5

Members6

Over the term

Events

Numbers

Titles3

Classification

Designated states25