Per Olof E Hedekvist

Visar 53 publikationer

2016

Implementation of an optical fiber frequency distribution via commercial DWDM

Sven-Christian Ebenhag, M. Zelan, Per Olof E Hedekvist et al
2016 IEEE International Frequency Control Symposium, IFCS 2016 - Proceedings, p. 601-602
Paper i proceeding
2016

Coherent optical two-way frequency transfer in a commercial DWDM network

Sven-Christian Ebenhag, M. Zelan, Per Olof E Hedekvist et al
47th Annual Precise Time and Time Interval Systems and Applications Meeting, PTTI 2016; Hyatt Regency MontereyMonterey; United States; 25 January 2016 through 28 January 2016, p. 116-120
Paper i proceeding
2015

Two-way coherent frequency transfer in a commercial DWDM communication network in Sweden

Sven-Christian Ebenhag, M. Zelan, Per Olof E Hedekvist et al
2015 Joint Conference of the IEEE International Frequency Control Symposium and the European Frequency and Time Forum, FCS 2015 - Proceedings, p. 276-279
Paper i proceeding
2013

Two-Color One-Way Frequency Transfer in a Metropolitan Optical Fiber Data Network

Sven-Christian Ebenhag, Per Olof E Hedekvist, R. T. Kenneth Jaldehag
NCSLI International Measure. Vol. 8 (2), p. 10-
Artikel i vetenskaplig tidskrift
2013

Two color one-way frequency transfer in an urban optical fiber network

Sven-Christian Ebenhag, Per Olof E Hedekvist, R. T. Kenneth Jaldehag
2013 Joint European Frequency and Time Forum and International Frequency Control Symposium, EFTF/IFC 2013, p. 1010-1013
Paper i proceeding
2012

Real-time Phase Stabilization Utilizing Two Color One-way Frequency Transfer

Sven-Christian Ebenhag, Per Olof E Hedekvist
66th IEEE International Frequency Control Symposium, IFCS 2012; Baltimore, MD; United States; 21 May 2012 through 24 May 2012, p. 667-672
Paper i proceeding
2012

Real-time Phase Stable One-way Frequency Transfer Over Optical Fiber

Sven-Christian Ebenhag, Claes Wingqvist, Per Olof E Hedekvist
Proceedings of the 26th European Frequency and Time Forum, p. 206 - 210
Paper i proceeding
2012

Two Color One Way Time and Frequency Transfer in an Urban Optical Fiber Data Communication WDM Network

Sven-Christian Ebenhag, Per Olof E Hedekvist
44th Precise Time and Time Interval (PTTI) Systems and Applications Meeting
Paper i proceeding
2012

Time and frequency transfer in optical fibers

Per Olof E Hedekvist, Sven-Christian Ebenhag
Recent Progress in Optical Fiber Research, p. 450-
Kapitel i bok
2011

One way time transfer utilizing active detection of propagation delay variations of dual wavelenghts in an optical fiber network

Sven-Christian Ebenhag, Per Olof E Hedekvist, R. T. Kenneth Jaldehag
43rd Annual Precise Time and Time Interval Systems and Applications Meeting 2011; Long Beach, CA; United States; 14 November 2011 through 17 November 2011, p. 9-16
Paper i proceeding
2011

Active optical pre-compensation in short range frequency transfer in optical single-mode fiber

Per Olof E Hedekvist, Sven-Christian Ebenhag, R. T. Kenneth Jaldehag
2011 Joint Conference of the IEEE International Frequency Control Symposium/European Frequency and Time Forum Proceedings, p. 315-316
Paper i proceeding
2011

Active detection of propagation delay variations in single way time transfer utilizing dual wavelengths in an optical fiber network

Sven-Christian Ebenhag, Per Olof E Hedekvist, R. T. Kenneth Jaldehag
Proceedings of the IEEE International Frequency Control Symposium and Exposition
Paper i proceeding
2011

Time Transfer between UTC(SP) and UTC(MIKE) Using Frame Detection in Fiber-Optical Communication networks

Sven-Christian Ebenhag, R. T. Kenneth Jaldehag, Carsten Rieck et al
43rd Precise Time and Time Interval (PTTI) Systems and Applications Meeting, p. 431-441
Paper i proceeding
2011

Time Transfer Using Frame Detection in Fiber-Optical Communication Networks: New Hardware

R. T. Kenneth Jaldehag, Sven-Christian Ebenhag, Carsten Rieck et al
Frequency Control and the European Frequency and Time Forum (FCS), Joint Conference of the IEEE International
Paper i proceeding
2010

Fiber based one-way time transfer with enhanced accuracy

Sven-Christian Ebenhag, Per Olof E Hedekvist, Jan Johansson
24th European Frequency and Time Forum, EFTF 2010; Noordwijk; Netherlands; 13 April 2010 through 16 April 2010
Paper i proceeding
2010

Measurements and Error Sources in Time Transfer Using Asynchronous Fiber Network

Sven-Christian Ebenhag, Per Olof E Hedekvist, Per O. J. Jarlemark et al
IEEE Transactions on Instrumentation and Measurement. Vol. 59 (7), p. 1918-1924
Artikel i vetenskaplig tidskrift
2010

Single way fiber based time transfer with active detection of time transfer variations

Sven-Christian Ebenhag, Per Olof E Hedekvist, R. T. Kenneth Jaldehag
42nd Precise Time and Time Interval (PTTI) Systems and Applications Meeting, Reston Virginia, November 15-18
Paper i proceeding
2010

0.87 Tbit/s 160 Gbaud dual-polarization D8PSK OTDM transmission over 110 km

Ekawit Tipsuwannakul, Michael Galili, Marios Bougioukos et al
ECOC'10, European Conference on Optical Communication, p. W.6.C.4-
Paper i proceeding
2009

Fiber based frequency distribution based on long haul communication lasers

Sven-Christian Ebenhag, Per Olof E Hedekvist, R. T. Kenneth Jaldehag
41st Annual Precise Time and Time Interval (PTTI) Systems and Applications Meeting 2009; Santa Ana Pueblo, NM; United States; 16 November 2009 through 19 November 2009, p. 57-65
Paper i proceeding
2009

Evaluation of Temperature Dependent Transit-Time in Dispersion Compensating Fibers

Anne Andersson, Håkan Skoogh, Sven-Christian Ebenhag et al
OFMC measurement of optical fibers and optoelectronics, September 16 – 18
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
2009

A fiber based frequency distribution system with enchanced output phase stability

Sven-Christian Ebenhag, Per Olof E Hedekvist, Carsten Rieck et al
Proceedings EFTF-IFCS2009 joint conference 20-24 April 2009, IEEE catalog number:CFP09FRE-CDR, p. 1061-1064
Paper i proceeding
2009

Time and frequency transfer using asynchronous fiber optical networks: progress report

R. T. Kenneth Jaldehag, Sven-Christian Ebenhag, Per Olof E Hedekvist et al
41st Precise Time and Time Interval (PTTI) Systems and Applications Meeting, Santa Ana Pueblo. NM, November 16-19
Konferensbidrag (offentliggjort, men ej förlagsutgivet)
2008

Time Transfer by Passive Listening Over a 10-Gb/s Optical Fiber

R. Emardson, Per Olof E Hedekvist, M. Nilsson et al
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT. Vol. 57 (11), p. 2495-2501
Artikel i vetenskaplig tidskrift
2007

Dispersion-Tolerant Millimeter-Wave Photonic Link Using Polarization-Dependent Modulation

Andreas Wiberg, Bengt-Erik Olsson, Per Olof E Hedekvist et al
Journal of Lightwave Technology. Vol. 25 (10), p. 2984-2991
Artikel i vetenskaplig tidskrift
2007

Optical demultiplexing of millimeter-wave subcarriers for wireless channel distribution employing dual wavelength FBGs

Pere Pérez-Millan, Andreas Wiberg, Per Olof E Hedekvist et al
Optics Communications. Vol. 275 (2), p. 335-343
Artikel i vetenskaplig tidskrift
2007

Time transfer using an asynchronous computer network: Results from three weeks of measurements

Sven-Christian Ebenhag, R. T. Kenneth Jaldehag, Per Olof E Hedekvist et al
European Frequency and Time Forum, 29/5 - 1/6, Geneva, CH
Paper i proceeding
2007

Utilizing an Active Fiber Optic Communication Network for Accurate Time Distribution

Per Olof E Hedekvist, T. Ragne Emardson, Sven-Christian Ebenhag et al
Transparent Optical Networks, 2007. ICTON '07. 9th International Conference. Vol. 1, p. 50-53
Paper i proceeding
2007

TIME TRANSFER USING AN ASYNCHRONOUS COMPUTER NETWORK: RESULTS FROM A 500 KM BASELINE EXPERIMENT

Sven-Christian Ebenhag, R. T. Kenneth Jaldehag, Per O. J. Jarlemark et al
Topical Meeting on Precise Time and Time Interval, 27-30/11, Long Beach, CA
Paper i proceeding
2007

Time transfer using an asynchronous computer network: An analysis of error sources

Sven-Christian Ebenhag, P. Jarlemark, Per Olof E Hedekvist et al
European Frequency and Time Forum, 29/5 - 1/6, Geneva, CH
Paper i proceeding
2006

Accurate time transfer utilizing the synchronization in an SDH-network

Per Olof E Hedekvist, T. Ragne Emardson, Mattias Nilsson et al
2006 Optical Fiber Communication Conference, and the 2006 National Fiber Optic Engineers Conference; Anaheim, CA; United States; 5 March 2006 through 10 March 2006
Paper i proceeding
2006

Microwave-photonic frequency multiplication utilizing optical four-wave mixing and fiber Bragg gratings

Andreas Wiberg, Pere Pérez-Millan, Miguel Andrés et al
Journal of Lightwave Technology. Vol. 24 (1), p. 329-334
Artikel i vetenskaplig tidskrift
2006

Evaluation of All-Optical Demultiplexing in Millimeter-Wave Subcarrier-System for Wireless Communication

Andreas Wiberg, Pere Pérez-Millan, Miguel Andrés et al
Proceedings of International Topical Meeting on Microwave Photonics. Vol. Paper T2.2
Paper i proceeding
2006

Time and Frequency Transfer in an Optical Fiber Network: First Results

T. Ragne Emardson, Per Olof E Hedekvist, R. T. Kenneth Jaldehag et al
Proc. of the 20th European Frequency and Time Forum, Braunschweig Germany, March 27 - 30
Paper i proceeding
2006

Selective Modulation of Optical Carriers Using Polarization Dependent Scheme for Dispersion-Tolerant Millimeter-Wave Photonic Links

Andreas Wiberg, Bengt-Erik Olsson, Per Olof E Hedekvist et al
Proceedings 32nd European Conference on Optical Communication (ECOC), Cannes, 24th-28th September, 2006. Vol. 3 (We1.6.2), p. 55-56
Paper i proceeding
2006

Dispersion induced effects of high-order optical sidebands in the performance of millimeter-wave fiber-optic links

Pere Perez-Millan, Andreas Wiberg, Per Olof E Hedekvist et al
Microwave and optical technology letters. Vol. 48 (7), p. 1436-1441
Artikel i vetenskaplig tidskrift
2005

Correction to “Noise Characteristics of Fiber Optical Parametric Amplifiers"

Per Kylemark, Per Olof E Hedekvist, Henrik Sunnerud et al
Journal of Lightwave Technology. Vol. 23 (6), p. 2192-2192
Artikel i vetenskaplig tidskrift
2005

6. Direct Comparison of Threshold and Gain Characteristics of 1300 nm GaInNAs lasers with GaNAs and GaAs Barriers

Yongqiang Wei, Ying Fu, Xiaodong Wang et al
APPLIED PHYSICS LETTERS. Vol. 87 (8), p. 081102-
Artikel i övriga tidskrifter
2005

Time and Frequency Transfer in an Asynchronous TCP/IP over SDH-network Utilizing Passive Listening

Ragne Emardsson, Per Olof E Hedekvist
IEEE Topical meeting on Precise Time and Time Interval 2005
Paper i proceeding
2005

Fiber-Optic 40-GHz mm-Wave Link With 2.5-Gb/s Data Transmission

Andreas Wiberg, Pere Pérez-Millan, Miguel Andrés et al
IEEE Photonics Technology Letters. Vol. 17 (9), p. 1938-1940
Artikel i vetenskaplig tidskrift
2005

Time and Frequency Transfer in an Asynchronous TCP/IP over SDH-network Utilizing Passive Listening

R. Emardson, Per Olof E Hedekvist, Mattias Nilsson et al
IEEE International Frequency Control Symposium and Precise Time and Time Interval (PTTI) Systems and Applications Meeting, Vancouver, B.C.
Paper i proceeding
2005

Direct Comparison of Threshold and Gain Characteristics of 1300 nm GaInNAs lasers with GaNAs and GaAs Barriers

Yongqiang Wei, Ying Fu, Xiaodong Wang et al
CLEO-/EUROPE-EQEC 2005, Muchen, Germany
Paper i proceeding
2005

Uni-Travelling-Carrier Photodiode Performance With X-band Modulation at High Optical Power

Manda Gustavsson, Per Olof E Hedekvist, Peter Andrekson
IEEE Microwave and Wireless Component Letters. Vol. 15 (5), p. 297-299
Artikel i vetenskaplig tidskrift
2004

Microwave Harmonic Frequency Generation utilizing the properities of an Optical Phase Modulator

Per Olof E Hedekvist, Bengt-Erik Olsson, Andreas Wiberg
Journal of Lightwave Technology. Vol. 22 (3), p. 882-886
Artikel i vetenskaplig tidskrift
2004

Uni-travelling-carrier photodiode performance with high optical power 10 Gb/s data

Manda Gustavsson, Per Olof E Hedekvist, Peter Andrekson
OSA Trends in Optics and Photonics, p. 774-776
Paper i proceeding
2004

Noise characteristics of fiber optical parametric amplifiers

Per Kylemark, Per Olof E Hedekvist, Magnus Karlsson et al
Journal of Lightwave Technology. Vol. 22, p. 409-416
Artikel i vetenskaplig tidskrift
2004

Photonic microwave generator utilizing narrowband Brillouin amplification and a fiber-based oscillator

Andreas Wiberg, Per Olof E Hedekvist
Proceedings of SPIE-Photonics Europe 2004, Microwave and Terahertz Photonics, Strasbourg, France, April 29-30, 2004. Vol. 5466, p. 148-156
Paper i proceeding
2004

38 GHz Microwave Photonic Generation utilizing Four-Wave and Fiber Bragg Gratings

Pere Perez Millan, Andreas Wiberg, Per Olof E Hedekvist et al
Paper TD-4 on Topical Meeting on Microwave Photonics, Ogungquit, ME, 2004
Paper i proceeding
2003

Harmonic generation of photonic microwave frequencies utilizing the properties of a phase modulator

Per Olof E Hedekvist, Bengt-Erik Olsson, Andreas Wiberg
Microwave Photonics, 2003. MWP 2003 Proceedings. International Topical Meeting on, p. 193-196
Paper i proceeding
2003

The fiber optic parametric amplifier and its applications for high-capacity communication and all-optical sampling

Magnus Karlsson, Per Olof E Hedekvist, Mathias Westlund et al
DOPS-NYT. Vol. 18 (4), p. 16-19
Artikel i övriga tidskrifter
2002

Long-term automatic PMD compensation for 160 Gbit/s RZ transmission

Mathias Westlund, Henrik Sunnerud, Jie Li et al
Electronics Letters. Vol. 38 (17), p. 982--983-
Artikel i vetenskaplig tidskrift
2001

Development of Ultrafast Photodiodes for Microwave Photonics

Manda Gustavsson, Jan Stake, Per Olof E Hedekvist
GigaHertz 2001
Paper i proceeding

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