Peter J Winzer, Christopher Richard Doerr: Multi-core optical fiber and optical communication systems. Alcatel Lucent, John F McCabe, August 6, 2013: US08503845 (122 worldwide citation)

An apparatus includes an optical fiber having a plurality of optical cores therein. Each optical core is located lateral in the optical fiber to the remaining one or more optical cores and is able to support a number of propagating optical modes at telecommunications wavelengths. Each number is less ...

Christopher Richard Doerr, John Evan Johnson, Charles H Joyner, Leonard Jan Peter Ketelsen, Uziel Koren, Dirk Joachim Muehlner, Rudolph Conrad Schweizer, Lawrence Warren Stulz: Hybrid integration of a wavelength selectable laser source and optical amplifier/modulator. Agere Systems Optoelectronics Guardian, J De La Rosa, August 14, 2001: US06275317 (74 worldwide citation)

A hybrid integrated optical transmitter comprising a wavelength selectable laser (WSL) source coupled to an optical amplifier/modulator has been realized. Disposed between the optical combiner and the optical amplifier/modulator is an “optical isolator.” The optical isolator includes at least a Fara ...

Christopher Richard Doerr, Charles H Joyner, Rene Henri Monnard, Lawrence Warren Stulz, Martin Zirngibl: Temperature compensated multi-channel, wavelength-division-multiplexed passive optical network. Lucent Technologies, John A Caccuro, October 16, 2001: US06304350 (55 worldwide citation)

Temperature compensation of a wavelength-division-multiplexed (WDM) passive optical network (PON) communication system uses power measurements from each of it remote nodes (RNs) to adjust the frequency of an associated multifrequency laser (MFL). Changes in the power level at each RN caused by frequ ...

Christopher Richard Doerr, Martin Zirngibl, Charles H Joyner: Method and apparatus for guiding optical signals. June 15, 1999: US05913000 (44 worldwide citation)

A method and apparatus for guiding optical signals in a laser cavity to determine the oscillation frequency or frequencies of a laser by controlling the lengths of waveguide grating arms.

Christopher Richard Doerr, Charles H Joyner: Laser transmitter based on a coupler and having a controlled output port. Lucent Technologies, November 16, 1999: US05987050 (39 worldwide citation)

A laser transmitter based on a star coupler includes a separate controlled output port. An interferometric modulator is incorporated inside a laser cavity by means of a star coupler and enables modulation of the laser signal, independent of the means of wavelength selection used to determine the fre ...

Christopher Richard Doerr, Martin Zirngibl: Polarization diversity waveguide grating receiver. September 15, 1998: US05809184 (38 worldwide citation)

A waveguide grating multifrequency receiver (MFR) is described with low polarization sensitivity. Polarization insensitivity is achieved using our polarization diversity scheme in which the TM polarized signal component of the unpolarized received input signal is converted to a second TE polarized s ...

Christopher Richard Doerr, Charles H Joyner, Rene Henri Monnard, Lawrence Warren Stulz: Multifrequency laser having reduced wave mixing. Lucent Technologies, April 25, 2000: US06055250 (29 worldwide citation)

A multifrequency laser (MFL) eliminates nonlinearities produced in the "shared" waveguide of the MFL laser (the section in which all the lightwaves from all the lasers pass) by either making the shared waveguide as short as possible to mimimize the production of mixing product signals or using a cha ...

Christopher Richard Doerr, Bernard Glance, Ivan P Kaminow: Optically restorable WDM ring network using simple add/drop circuitry. Lucent Technologies, July 13, 1999: US05923449 (26 worldwide citation)

A parallel ring network is restorable upon sensing a failure of a transmission media. A central transmitter is coupled to one end of a first transmission medium. A central receiver is coupled to one end of a second transmission medium. A central sensor senses a transmission media failure centrally a ...

Christopher Richard Doerr: Channel power equalizer for a wavelength division multiplexed system. Lucent Technologies, John A Caccuro, April 3, 2001: US06212315 (25 worldwide citation)

A dynamically and chromatically variable transmissivity apparatus (e.g., a channel equalizer or an add-drop circuit) controls channel powers in wavelength-division multiplexed systems. The input WDM signal is split into two components, in one component a phase shift is added to the wavelengths needi ...

Christopher Richard Doerr: Wavelength-division-multiplexing cross-connect using angular dispersive elements and phase shifters. Lucent Technologies, April 11, 2000: US06049640 (25 worldwide citation)

A Wavelength-Division-Multiplexer (WDM) cross-connect is implemented using two connected units of angular dispersive elements, with non-zero relative phase shifts between the elements, which are interconnected using controllable phase shifters. Another embodiment uses two "interleave-chirped" wavegu ...