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
David J DiGiovanni, Clinton R Giles: Multi-stage optical amplifier. AT&T Bell Laboratories, Eli Weiss, May 19, 1992: US05115338 (77 worldwide citation)

This invention relates to an Erbium-doped fiber amplifier having multiple stages of amplification for providing enhanced performance. More specifically, optical means is located intermediate first and second stages of doped optical amplifying fibers adapted to receive a pump signal at a pump wavelen ...


3
Emmanuel Desurvire, Clinton R Giles, Jay R Simpson, John L Zyskind: Erbium-doped fiber amplifier. AT&T Bell Laboratories, Eli Weiss, April 2, 1991: US05005175 (64 worldwide citation)

This invention is a rare earth doped optical amplifier with increased gain and lowered pump thresholds. The amplifying scheme is based on a 3 level lasing system rather than the more prevalent 4 level lasing system. Additionally, the transmission mode of the optical fiber at the pump wavelength has ...


4
Emmanuel Desurvire, Clinton R Giles: Method of operating concatenated optical amplifiers. AT&T Bell Laboratories, Eli Weiss, May 26, 1992: US05117303 (57 worldwide citation)

In a transmission system having concatenated optical amplifiers, gain saturation of the optical amplifiers at any stage is caused by the extraction of power from the amplifier by the ASE and amplification of the signal and of the ASE from previous stages. Three methods of operating transmission syst ...


5
Clinton R Giles: Multichannel optical fiber communications. Lucent Technologies, George S Indig, May 27, 1997: US05633741 (55 worldwide citation)

WDM optical fiber communications entails bidirectional transmission with at least two WDM channels in opposite transmission directions in a single fiber. As compared with unidirectional transmission, a number of capacity-limiting considerations are relaxed. Operation using in-ground dispersion-shift ...


6
David J DiGiovanni, Clinton R Giles, Stuart A Kramer, Gerald Nykolak, Herman M Presby, Jay R Simpson: High gain multi-mode optical amplifier. AT&T Bell Laboratories, Charles E Graves, February 16, 1993: US05187759 (55 worldwide citation)

Indiscriminately exciting the modes of a multi-mode optical fiber amplifier is avoided by an optical fiber amplifier design in which the excitation of pump modes in the core of a multi-mode fiber is controlled by controlling the pump light launching. The pump light is directed substantially along th ...


7
Vladimir J Aksyuk, Bradley P Barber, David J Bishop, Clinton R Giles, Lawrence W Stulz, Rene R Ruel: Optical switch. Lucent Technologies, March 20, 2001: US06205267 (54 worldwide citation)

An optical switch uses a MEMS device to insert a highly reflective shutter in a gap between a pair of coaxially aligned fibers. When the switch is closed, an input optical signal passes with little loss through the gap. When the switch is open and the shutter is positioned in the gap, an input optic ...


8
Emmanuel Desurvire, Clinton R Giles, John L Zyskind: Erbium-doped fiber amplifier. AT&T Bell Laboratories, Eli Weiss, June 25, 1991: US05027079 (51 worldwide citation)

This invention relates to an Erbium doped fiber amplifier having improved operating characteristics. Parameters which determine the operating characteristics of an erbium doped fiber amplifier are the concentration of erbium in the core of a fiber; the ratio of the radius of the core of the fiber do ...


9
David J Bishop, Clinton R Giles: Pixellated WDM optical components. Lucent Technologies, July 17, 2001: US06263123 (50 worldwide citation)

A micromirror array is used to form optical apparatus useful in WDM optical networks. In one embodiment, the micromirror array is used to insert a desired attenuation in individual channels for purposes such as equalization. In another embodiment, the micromirror array is used to form an optical mon ...


10
Robert D Feldman, Clinton R Giles, Thomas H Wood: Passive optical network for dense WDM downstream data transmission and upstream data transmission. Lucent Technologies, January 26, 1999: US05864413 (45 worldwide citation)

A passive optical network for the downstream dense wavelength division multiplexing communication of data between a host terminal complex (HTC) and a plurality of optical network units (ONUs), and for the upstream communication of data from the ONUs to the HTC. The network includes a routing device ...