Title: Optical intermediate amplifier for a communication system

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Claims: I claim:

1. An intermediate amplifier for an optical transmission system having optical wave guides, comprising an optical amplifier which amplifies light waves according to the laser principle, an incoming wave guide connected to said optical amplifier, and an outgoing wave guide connected to said optical amplifier, said outgoing wave guide including a zone having an absorption characteristic for frequencies outside of the frequency band of light pulses which are to be transmitted through the intermediate amplifier.

Other info:

Inventors: Zeidler, Gunter (8034 Unterpfaffenhofen, DT)

Application Number: 399633
Filing Date: 1973-09-21
Publication_date: 1976-04-06
Assignee:
Primary Class(es): 359/337.2 250/227.11, 359/337, 359/344, 372/43
Other Classes:
US Patent Ref:

3417345	Dec, 1968	Cabezas et al.	331/94.
3571737	Mar, 1971	Miller	250/199.
3626319	Dec, 1971	Young	331/94.
3751655	Aug, 1973	Codrino	350/96.

Other Refs:
Primary Examiner: Wilbur, Maynard R.
Assistant Examiner: Moskowitz, N.
Attorney: Hill, Gross, Simpson, Van Santen, Steadman, Chiara & Simpson