Daniel N Harres

6738436, May 18, 2004

Jul 19, 2000

09/621899

Daniel N. Harres - Belleville IL

The Boeing Company - Chicago IL

H03D 100

375343

A matched-filter receiver includes a detector that generates a current signal based on light input thereto. An integrating circuit has an input that is connected to the detector. The integrating circuit integrates the current signal and outputs an integrated signal. A delay circuit is connected to an output of the integrating circuit. The delay circuit delays the integrated signal for a first duration. A comparator circuit includes an inverting input that is connected to the output of the integrating circuit and to an output of the delay circuit. The integrating circuit includes a resistor having a parasitic capacitance. The integrating circuit includes an amplifier circuit that amplifies the integrated signal. The duration that the delay circuit delays the integrated signal can be set to a plurality of duration values. The comparator provides an output signal having one of a first state and a second state.

6862397, Mar 1, 2005

Oct 15, 2002

10/270996

Daniel N. Harres - Belleville IL, US
Samuel I. Green - Saint Louis MO, US

The Boeing Company - Chicago IL

G02B006/00

385147, 385 12, 385 24, 385 53, 385 52, 385100, 25022711

A method for introducing errors into a digital fiber optic communication link so that small analog changes in optical transmission efficiency can be determined by changes in the audible error rate. The method comprises providing a transmitter with a test channel that provides a pseudorandom encoded optical transmission through coupled fiber optic cables. The signal is sent through the cables and received by a receiver which introduces and measures errors. The received signal is split and processed by a clock recovery circuit and a lowpass filter. The clock recovery circuit obtains the optimal sampling point. The lowpass filter filters the data and provides a timing adjustment relative to the recovered clock signal. The clock retimes the filtered data with a sampling comparator. The variable timing introduces errors allowing optical transmission efficiency measurements.

6880114, Apr 12, 2005

Jan 31, 2002

10/061517

Daniel N. Harres - Belleville IL, US

The Boeing Company - Chicago IL

H03M013/00
G01R031/28

714709, 714733

A test signal attenuation circuit is built into a signal transmitter for modifying the energy content of the transmitter output signal. The built-in test signal attenuation circuit includes circuits for generating an attenuated, degraded, chopped signal. The built-in test signal attenuation circuit may be used for purposes of testing the performance of a link under degraded conditions.

7010621, Mar 7, 2006

Feb 14, 2002

10/076188

Robert L. Calkins - Florissant MO, US
Daniel N. Harres - Belleville IL, US
Daniel W. Konz - Florissant MO, US
Mark D. Rogers - Ballwin MO, US

The Boeing Company - Chicago IL

G06F 15/16

709250, 709205, 375130, 375131, 375132, 713400, 713401, 713501, 713502, 713503

A network system includes a network having a network bus, such as unshielded differential twisted-pair wires, electrically connected to a plurality of remote devices, and a network controller for digitally directing transmissions with the remote devices via the network bus. The network system also includes a plurality of network device interface elements adapted to interconnect the network controller with respective remote devices via the network bus. Each network device interface element includes a local oscillator, and is capable of transmitting and receiving messages via the network bus. To at least partially limit electromagnetic emissions from the local oscillator, each network device interface element further includes a spread-spectrum clock. And to further aid in limiting electromagnetic emissions, each network device interface element can further include a suppression assembly.

7011453, Mar 14, 2006

Dec 9, 2004

11/008468

Daniel N. Harres - Belleville IL, US

The Boeing Company - Chicago IL

G02B 6/26
G02B 6/00
H04B 10/08
G01N 21/00

385 53, 356 731, 385 12, 398 10, 398 17, 398 21

Methods and apparatus for detecting degradation of a fiber optic connector. In a preferred embodiment, the method includes transmitting a optical pulse in a first direction along the fiber optic cable such that a first portion of the optical pulse is either absorbed or reflected by the degradation. The method also includes determining the degradation's location within at most two connectors of the cable based on the first portion of the optical pulse. If the at most two connectors is two connectors then the method includes transmitting a second optical pulse in a second direction along the cable so that a portion of the second optical pulse is either absorbed or reflected by the degradation. A determination is made of the location of the degradation within one of the two connectors based on the first portion and the second portion of the optical pulses.

7027685, Apr 11, 2006

Aug 20, 2003

10/644124

Daniel N. Harres - Belleville IL, US

The Boeing Company - Chicago IL

G02B 6/28

385 24, 385 15

Apparatus and methods for fiber optic links having a built-in test are disclosed. In one embodiment, an optical component includes a signal source, and a controller operatively coupled to the signal source. The signal source is adapted to output a first combined optical signal having a first optical signal portion of a first frequency and a second optical signal portion of a second frequency. The first frequency is substantially greater than the second frequency. The controller is adapted to induce the signal source to output the first and second optical signal portions, the first optical signal portion being associated with a main communication function and the second optical signal portion being associated with a monitoring function.

7030975, Apr 18, 2006

May 13, 2004

10/845398

Daniel N. Harres - Belleville IL, US

The Boeing Company - Chicago IL

G01N 21/00

356 731

Apparatus and methods for improved fiber optic signal transmission systems are disclosed. In one embodiment, a reflectometer includes an optical source to emit optical energy into a the fiber optic line and to generate time-delayed signals from the repetitive pulses, an optical receiver to detect reflected energy from the fiber optic line and generate reflected signals from the reflected energy, a mixer that receives the reflected signals and receives the time delayed signals to generate a product waveform from the reflected signals and the time-delayed signals, and a processor that receives the product waveform to process the waveform to generate a value based on the sampled characteristic.

7050665, May 23, 2006

Feb 27, 2004

10/788987

Daniel N. Harres - Belleville IL, US
Samuel I. Green - St. Louis MO, US

The Boeing Company - Chicago IL

G02B 6/12
H04B 10/00

385 14, 385 88, 385 89, 385 92, 385 94, 398 67, 398 72, 398 82, 398139

Bi-directional optical signal transmission apparatus and methods are disclosed. In one embodiment, an optical detector is configured to receive an optical signal from an end of an optical fiber. An optical element is located at the detector surface and is configured to receive and direct a laser beam. A laser beam is directed by the optical element through the end into the optical fiber substantially parallel with the principal axis.