Christian S Rasmussen

Author:

Christian Rasmussen

ISBN #:

8787582546

Author:

Christian Heilskov Rasmussen

ISBN #:

8770281912

Author:

Christian Heilskov Rasmussen

ISBN #:

8770282455

Author:

Christian Heilskov Rasmussen

ISBN #:

8770282536

US Patent:

7949261, May 24, 2011

Filed:

Apr 25, 2007

Appl. No.:

11/740212

Inventors:

Benny Mikkelsen - Newton MA, US
Pavel Mamyshev - Morganville NJ, US
Christian Rasmussen - Shrewsbury MA, US
Fenghai Liu - Nashua NH, US

Assignee:

Mintera Corporation - Acton MA

International Classification:

H04B 10/06

US Classification:

398208, 398202, 398209, 398212, 398213, 398140, 398141, 398158

Abstract:

An optical receiver includes a demodulator having a delay interferometer comprising an optical input that receives a phase modulated optical signal from a bandwidth limited transmission system. The delay interferometer has a free spectral range that is larger than a symbol rate of the phase modulated optical signal by an amount that improves receiver performance. The receiver also includes a differential detector having a first and a second photodetector. The first photodetector is optically coupled to the constructive optical output of the delay interferometer. The second photodetector is optically coupled to the destructive optical output of the delay interferometer. The differential detector combines a first electrical detection signal generated by the first photodetector and a second electrical detection signal generated by the second photodetector to generate an electrical reception signal.

US Patent:

20110280588, Nov 17, 2011

Filed:

Apr 14, 2011

Appl. No.:

13/086804

Inventors:

Benny MIKKELSEN - Newton MA, US
Pavel MAMYSHEV - Morganville NJ, US
Christian RASMUSSEN - Shrewsbury MA, US
Fenghai LIU - Nashua NH, US

International Classification:

H04B 10/06

US Classification:

398202

Abstract:

An optical receiver includes a demodulator having a delay interferometer comprising an optical input that receives a phase modulated optical signal from a bandwidth limited transmission system. The delay interferometer has a free spectral range that is larger than a symbol rate of the phase modulated optical signal by an amount that improves receiver performance. The receiver also includes a differential detector having a first and a second photodetector. The first photodetector is optically coupled to the constructive optical output of the delay interferometer. The second photodetector is optically coupled to the destructive optical output of the delay interferometer. The differential detector combines a first electrical detection signal generated by the first photodetector and a second electrical detection signal generated by the second photodetector to generate an electrical reception signal.

US Patent:

20140105617, Apr 17, 2014

Filed:

Oct 17, 2013

Appl. No.:

14/056520

Inventors:

- Maynard MA, US
Christian RASMUSSEN - MAYNARD MA, US

International Classification:

H04B 10/61

US Classification:

398208

Abstract:

Disclosed herein are methods, structures, and devices that provide multi-range frequency domain compensation of chromatic dispersion within optical transmission systems that offer significant operational power savings. More specifically, a method of operating frequency domain filtering structures and circuits including FFT, frequency-domain filter multiplication and iFFT functions at a lower duty cycle for shorter overlap such that significant power savings is realized.