C. R. Doerr

ON Semiconductor (United States)

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Peter J. Winzer

RheinMain University of Applied Sciences

S. Chandrasekhar

Nokia (United States)

A.H. Gnauck

Nokia (United States)

L.W. Stulz

Nokia (United States)

L. L. Buhl

Nokia (United States)

L.L. Buhl

Nokia (United States)

H. A. Haus

Massachusetts Institute of Technology

J. Leuthold

Research Institute for Electromagnetic Materials

G. Raybon

Nokia (United States)

M. Shirasaki

Winchester Technologies (United States)

Cooperative Institutions

Nokia (United States)

Alcatel Lucent (Germany)

Massachusetts Institute of Technology

AT&T (United States)

Institute of Electrical and Electronics Engineers

Providence College

OFS (United States)

University of California, Santa Barbara

Intel (United States)

Nokia (Finland)

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Technique for obtaining high-energy ultrashort pulses from an additive-pulse mode-locked erbium-doped fiber ring laser

Optics Letters (1994)

K. Tamura C. R. Doerr L.E. Nelson H. A. Haus Erich P. Ippen

We report a self-starting stretched-pulse polarization additive-pulse mode-locked erbium-doped fiber ring laser with high output power. By using the light normally absorbed by the intracavity polarizer as the output, we obtained pulses with energies greater than 0.5 nJ at a repetition rate of 48 MHz. External chirp compensation was used to shorten the highly chirped output pulses to durations of less than 100 fs. The power levels suggest that erbium-doped fiber lasers may replace bulk solid-state lasers, such as the color-center laser, for some applications.

Polarizer

Ring laser

Erbium

Mode-Locking

Q-switching

10.1364/ol.19.000046

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Citations (140)

Polarisation-mode dispersion impairments in direct-detection differential phase-shift-keying systems

Electronics Letters (2002)

H. Kim C. R. Doerr R. Pafchek L.W. Stulz P. Bernasconi

Evaluation of the system performance degraded by first-order polarisation-mode dispersion (PMD) for non-return-to-zero (NRZ) or return-to-zero (RZ) differential phase-shift-keying (DPSK) signals is presented. The PMD-induced power penalties were measured with a PMD emulator for an optically preamplified receiver. The results show that the PMD sensitivities of DPSK signals are comparable with on-off keying signals.

Differential phase

Amplitude-shift keying

10.1049/el:20020601

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Citations (13)

Monolithic demodulator for 40-gb/s DQPSK using a star coupler

Journal of Lightwave Technology (2006)

C. R. Doerr D. M. Gill A.H. Gnauck L. L. Buhl Peter J. Winzer

A novel device that demodulates both quadratures of the optical differential quadrature phase-shift keying (DQPSK) format in a single interferometer by using a 4 /spl times/ 4 star coupler was demonstrated. Simultaneous measurements of both DQPSK quadratures at 42.7 Gb/s are also presented.

Differential phase

Quadrature (astronomy)

Star (game theory)

10.1109/jlt.2005.860476

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Citations (48)

Silicon Photonics in Optical Coherent Systems

Proceedings of the IEEE (2018)

C. R. Doerr Long Chen

Optical coherent systems, which employ the interference of a received optical signal with a local laser to achieve high signal-to-electrical-noise ratio and capture the magnitude, phase, and polarization of the signal, have grown dramatically in the last decade due to improvements in digital signal processors. The optics of both the transmitter and receiver have grown in complexity, and its deployment has benefitted greatly from the integration offered by silicon photonics. Today’s coherent systems range from 1.2-Tb/s fiber-optic communication transceivers to optical coherence tomography medical instruments. This paper will give an overview of optical coherent systems, present the state-of-the-art in silicon photonic components shipping today, and discuss where silicon photonics is going in this field.

10.1109/jproc.2018.2866391

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Citations (85)

All-optical dual ring internetworking with wavelength selective 2×2 cross-connect

Electronics Letters (2000)

S. Chandrasekhar H.K. Kim C. R. Doerr L.W. Stulz L. L. Buhl

Internetworking between two WDM ring networks, each carrying 160 Gbit/s traffic, has been achieved using a monolithic 2×2 multi-wavelength filter. OC-192 wavelengths originating in one ring, terminating in the other ring, traversing up to three add/drop nodes and 75 kms of fibre, suffered less than 0.5 dB penalty.

Internetworking

Gigabit

Traverse

10.1049/el:20000202

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Citations (2)

Silicon-based Integrated Broadband Wavelength-meter with Low Temperature Sensitivity

Optical Fiber Communication Conference (OFC) 2022 (2020)

Long Chen C. R. Doerr Shenghua Liu Li Chen Michelle Xu

We demonstrated an integrated broadband wavelength-meter with three optical 90-degree mixers, differential photodiodes, and delays of thin TM waveguides, allowing unambiguous wavelength determination over 4 THz with high accuracy and relaxed requirement on temperature control.

Photodiode

10.1364/ofc.2020.m1c.3

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Citations (1)

Flexible waveband optical networking without guard bands using novel 8-skip-0 banding filters

IEEE Photonics Technology Letters (2005)

S. Chandrasekhar C. R. Doerr L.L. Buhl

Novel five-band 8-skip-0 band filters realized in silica waveguide planar lightwave circuit technology were successfully used to demonstrate versatile wavelength-division-multiplexed (WDM) optical networking. Forty C-band channels spaced 100 GHz apart grouped in five bands of eight channels each allowed WDM networking without loss of any channel within the available optical bandwidth. We demonstrate simultaneous transport of 10 and 40 Gb/s with rate-appropriate optical add-drop nodes.

Optical add-drop multiplexer

Optical networking

Optical cross-connect

Multiwavelength optical networking

10.1109/lpt.2004.842385

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Citations (27)

Novel higher order PMD distortion mitigation technique for RZ signals

L. Möller J.H. Sinsky H. Haunstein S. Chandrasekhar C. R. Doerr

We have demonstrated that optical narrow bandwidth filtering of RZ signals can reduce pulse distortions that result from higher order PMD. The required filter bandwidth is significantly smaller than conventional filter rules predicted for optimal detection in the case of no PMD. Advantageously, this higher order PMD mitigation method requires no active channel adaptation, only a passive filter.

Distortion (music)

10.1109/ofc.2002.1036330

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Citations (1)

Terabit Transmission at 42.7-Gb/s on 50-GHz Grid Using Hybrid RZ-DQPSK and NRZ-DBPSK Formats Over 16$\,\times\,$80 km SSMF Spans and 4 Bandwidth-Managed ROADMs

Journal of Lightwave Technology (2008)

S. Chandrasekhar Xiang Liu Daniel C. Kilper C. R. Doerr A.H. Gnauck

We demonstrate for the first time the use of asymmetric-bandwidth interleaver-based reconfigurable optical add-drop multiplexer (ROADM) to transmit 42.7-Gb/s channels on a 50-GHz grid. Differential binary phase shift keyed (DBPSK) format was used on the wide passband side and differential quadrature phase shift keyed (DQPSK) format was used on the narrow passband side of the ROADM. 25 channels with an aggregate capacity of 1-Tb/s were transported over 1280-km of standard single-mode fiber (SSMF) including 4 ROADMs.

Terabit

Passband

10.1109/jlt.2007.913019

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Citations (25)

Transmission of 107-Gb/s DQPSK over verizon 504-km commercial lambdaxtreme® transport system

Optics InfoBase Conference Papers (2008)

Tiejun J. Xia Glenn A. Wellbrock W. Lee Gregory W. Lyons P. Hofmann

A 107-Gb/s field trial was conducted on a traffic carrying long-haul LambdaXtreme® transport platform over an active 504-km Verizon route in Florida thus proving upgradeability to 100 G of the Alcatel-Lucent 50-GHz spaced ULH DWDM system.

Field trial

Source

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