Luxdyne Ltd.

Espoo, Finland

Luxdyne Ltd.

Espoo, Finland
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Tervonen A.,Luxdyne Ltd. | Tervonen A.,Aalto University | Mattila M.,Luxdyne Ltd. | Mattila M.,Aalto University | And 8 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2011

Photonic balancing - a scheme where logically opposite pulses derived from the two outputs of a delay-line demodulator for phase shift keyed (PSK) signals counter-propagate in the saturated regime of a semiconductor optical amplifier (SOA) - has been proven to enhance the receiver performance, e.g. in terms of decreased optical signal-to-noise-ratio (OSNR) requirements for a given target bit error ratio (BER). Here, we extend the photonic balancing scheme towards a new concept for a regenerative amplifier targeted at extending the reach and/or the number of subscribers in passive optical networks (PON) in order to support major operators' plans to reduce the number of central offices and access areas by approximately 90%. For a given target BER, we demonstrate experimentally (a) an 8-dB higher post-amplifier loss tolerance, (b) an extended feeder line length (75 km) combined with high splitting ratio (10 layers) for a preamplified version, and (c) high input power variation tolerance (> 30 dB burst-to-burst) in upstream direction as needed for highly asymmetric tree structures. © 2010 COPYRIGHT SPIE - The International Society for Optical Engineering.


Von Lerber T.,TU Darmstadt | Von Lerber T.,Luxdyne Ltd. | Zogal K.,TU Darmstadt | Gierl C.,TU Darmstadt | And 4 more authors.
2011 IEEE International Topical Meeting on Microwave Photonics - Jointly Held with the 2011 Asia-Pacific Microwave Photonics Conference, MWP/APMP 2011 | Year: 2011

In this paper we discuss about the extended reach 10-Gbit/s Passive Optical Network (XGPON) and the use of a Saturated Collision Amplifier (SCA) for the up- and downstream extension. Especially the upstream amplification is challenging because of the used (i.e. standardized) wavelength and the bursty nature of the traffic. In order to benefit the SCA scheme, the Optical Network Units (ONUs) have to be equipped with low-cost DPSK transmitters. The use of widely tunable direct modulated VCSELs are proposed and discussed. © 2011 IEEE.


Chaouch H.,University of Arizona | Parsons E.,University of Arizona | Parsons E.,Tyco Electronics | Tervonen A.,Luxdyne Ltd. | And 10 more authors.
Optics Communications | Year: 2011

We demonstrate three novel all-optical signal processing methods for RZ-DPSK signals using a saturated SOA. The two logically opposite pulse streams from a demodulated noisy RZ-DPSK signal counter-propagate in the SOA. This configuration decreases the fluctuations in the demodulated marks while preventing the spaces from getting amplified. Photonic balancing provides functionality analogous to electrical balanced detection by reducing the required OSNR, and saturated asymmetric filtering removes the in-band ASE noise before detection. These methods are demonstrated experimentally by observing eye diagrams and BER measurements at 10.7 Gb/s and 22.3 Gb/s. © 2011 Elsevier B.V. All rights reserved.


Von Lerber T.,Luxdyne Ltd. | Von Lerber T.,TU Darmstadt | Tervonen A.,Luxdyne Ltd. | Tervonen A.,Aalto University | And 9 more authors.
Optics Express | Year: 2011

Saturated Collision Amplifier (SCA) is a novel amplification scheme that uses SOA saturation in order to maximize the output power and minimize the ASE noise and the polarization sensitivity. We demonstrate the SCA reach extension in a commercial single-wavelength XGPON1 prototype system where bidirectional optical budget of up to 50 dB is obtained. The traffic performances are compared between the SCA and the conventional SOA extender. The novel extension scheme is demonstrated also for two-and four-wavelength 10 Gbit/s unidirectional downstream configurations with 45 km and 100 km transmission distances with 58-dB maximum total optical budget for each wavelength. © 2011 Optical Society of America.


Le Q.T.,Orange Group | Saliou F.,Orange Group | Xia R.,Orange Group | Chanclou P.,Orange Group | And 9 more authors.
European Conference on Optical Communication, ECOC | Year: 2011

This paper presents for the first time the network architecture and the multiple-wavelength operation of a novel SOA-based PON extender. In 10-Gbit/s four-wavelength 100-km configuration, the total optical budget for each wavelength is 58 dB. © 2011 OSA.


Saliou F.,Orange Group | Xia R.,Orange Group | Le Q.T.,Orange Group | Chanclou P.,Orange Group | And 9 more authors.
European Conference on Optical Communication, ECOC | Year: 2011

Reach Extenders based on Semiconductor Optical Amplifiers are experimented on a commercial prototype XGPON1 system. Bidirectional performances are evaluated and improved using a novel SOA operation. Up to 50dB of optical budget is obtained. © 2011 OSA.


Le Q.T.,Orange Group | Saliou F.,Orange Group | Xia R.,Orange Group | Chanclou P.,Orange Group | And 9 more authors.
Optics InfoBase Conference Papers | Year: 2011

This paper presents for the first time the network architecture and the multiplewavelength operation of a novel SOA-based PON extender. In 10-Gbit/s four-wavelength 100-km configuration, the total optical budget for each wavelength is 58 dB. © 2011 OSA.


Tervonen A.,Luxdyne Ltd. | Tervonen A.,Aalto University | Mattila M.,Luxdyne Ltd. | Weiershausen W.,Luxdyne Ltd. | And 6 more authors.
European Conference on Optical Communication, ECOC | Year: 2010

A novel two-output PON amplifier is demonstrated to provide over 8-dB output power budget improvement over a conventional SOA, with negligible ASE noise. With an additional preamplifier it can accommodate up to 30 dB burst-to-burst power variation. ©2010 IEEE.


Kueppers F.,University of Arizona | Parsons E.,University of Arizona | Chaouch H.,University of Arizona | Weiershausen W.,Luxdyne Ltd. | And 3 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2010

We present an optical receiver for RZ-DPSK signals that use photonic balancing. Photonic balancing is achieved through pulse counter-propagation and collision in a saturated SOA. We explain the principles of photonic balancing and show how it can lead to an improvement in RZ-DPSK detection by 3 dB, similar to electrical balancing. We also show how this scheme can be used as a Mamyshev-type regenerator. © 2009 Copyright SPIE - The International Society for Optical Engineering.


Patent
Luxdyne Ltd. | Date: 2010-01-20

An optical signal regeneration technique includes receiving optical symbols in a phase-modulation format. The received symbols are converted to symbols in a phase/amplitude-modulation format. A first amplitude regeneration, which involves reduction of amplitude noise, is applied to a first symbol pair. A modulation format conversion is performed on the optical signal in the phase/amplitude modulation format after the first amplitude regeneration. A second amplitude regeneration is applied to a second symbol pair, wherein the first and second symbol pairs differ from one another in respect of at least one different feature, which is selected from a group that includes a different nominal phase value assigned to the symbols of the symbol pair and a different temporal distance between the symbols of a symbol pair.

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