1
David J DiGiovanni, Clinton R Giles: Multi-stage optical fiber amplifier. AT&T Bell Laboratories, Eli Weiss, September 24, 1991: US05050949 (122 worldwide citation)

In this invention there is disclosed a multi-stage optical fiber amplifier for providing a new functon, that of gain equalization. The disclosed multi-stage optical fiber amplifier comprises at least two stages of amplification where each stage comprises an amplifying fiber having a different gain s ...


2
Digiovanni David J, Giles Clinton Randy: Multi-stage optical fiber amplifier.. American Telephone & Telegraph, January 2, 1992: EP0463771-A2 (21 worldwide citation)

In this invention there is disclosed a multi-stage optical fiber amplifier for providing a new function, that of gain equalization. The disclosed multi-stage optical fiber amplifier comprises at least two stages of amplification where each stage comprises an amplifying fiber having a different gain ...


3
Rolando Patricio Espindola, Isaac Ryazansky, Andrew John Stentz, Kenneth Lee Walker, Paul Francis Wysocki: Multi-stage optical fiber amplifier having high conversion efficiency. Lucent Technologies, Eugen E Pacher, August 15, 2000: US06104733 (14 worldwide citation)

We have found that the conversion efficiency of a Er/Yb-doped cladding pumped fiber amplifier increases with increasing signal input power. Thus, preamplification of the input signal by means of an Er-doped fiber amplifier can result in increased conversion efficiency of the cladding pumped power am ...


4
Gregory J Cowle, Felton A Flood, Chia Chi Wang, Luis A Zenteno: L band multistage amplifier with improved noise figure. Corning Incorporated, Svetlana Short, August 27, 2002: US06441953 (7 worldwide citation)

A multi-stage optical fiber amplifier comprises a first gain stage amplifying and optical signal; a pumping source coupled to the first gain stage, a second gain stage coupled to the first gain to further amplifying the optical signal to a desired output signal power, and a second pumping source cou ...


5
Yun Chel Jung, Chel Han Kim: Optical fiber amplifier using synchronized etalon filter. Samsung Electronics, Robert E Bushnell Esq, January 30, 2001: US06181467 (4 worldwide citation)

A multi-stage optical fiber amplifier having a high gain, a high output power and a low noise figure, without limiting a gain bandwidth includes at least two stages of cascade connected optical fiber amplifiers. A synchronized etalon filter is disposed between the optical fiber amplifiers. The etalo ...


6
Cowle Gregory John, Flood Felton Aaron, Wang Chia Chi, Zenteno Luis Alberto: Mutli-stage optical fiber amplifier. Corning Incorporated, July 21, 2002: TW496019 (1 worldwide citation)

A multi-stage optical fiber amplifier comprises a first gain stage amplifying and optical signal; a pumping source coupled to the first gain stage, a second gain stage coupled to the first gain to further amplifying the optical signal to a desired output signal power, and a second pumping source cou ...


7
Motoki Kakui: Multi-stage optical fiber amplifier with high gain and low duty cycle. Megaopto, McDermott Will & Emery, July 23, 2013: US08493653

The present invention relates to an optical fiber amplifying module equipped with a structure for stably attaining a high gain even when amplifying light having a low duty cycle. The optical fiber amplifying module comprises at least three amplification optical fibers successively arranged from an i ...


8
Woo Jin Shin: Optical amplifier using optical fiber. GWANGJU INSTITUTE OF SCIENCE AND TECHNOLOGY, Hauptman Ham, October 31, 2017: US09806492

The present disclosure provides an optical amplifier using an optical fiber. The optical fiber includes a single-mode optical fiber in which a plurality of rare earth elements is doped simultaneously; first and second optical fiber gratings disposed at opposite sides of the optical fiber, respective ...


9
Yun Chel Jung, Chel Han Kim: Optical fiber amplifier using synchronized etalon filter. Samsung Electronics, zhang zhicheng, June 16, 1999: CN98126022

A multi-stage optical fiber amplifier having a high gain, a high output power and a low noise figure, without limiting a gain bandwidth includes at least two stages of cascade connected optical fiber amplifiers. A synchronized etalon filter is disposed between the optical fiber amplifiers. The etalo ...


10
Cowle Gregory J, Flood Felton A, Wang Chia C, Zenteno Luis A: Multi-stage optical fiber amplifier. Corning Incorporated, SHORT Svetlana Z, November 1, 2001: WO/2001/082422

A multi-stage optical fiber amplifier comprises a first gain stage amplifying and optical signal; a pumping source coupled to the first gain stage, a second gain stage coupled to the first gain to further amplifying the optical signal to a desired output signal power, and a second pumping source cou ...