搜索结果: 91-105 共查到“光学工程 Modulation”相关记录144条 . 查询时间(0.019 秒)
A UWB over Fibre Transmitter Reconfigurable for Multiple Modulation Schemes
UWB Fibre Transmitter Multiple Modulation Schemes
2009/7/17
A UWB over fiber transmitter that can be reconfigured to implement pulse-polarity modulation, pulse-shape modulation, pulse-amplitude modulation and on-off keying modulation is proposed and demonstrat...
Simultaneous Broadband Wired/Millimeter-Wave Band Transmission with Broadcasting Signal Using Direct ASE Modulation of an RSOA for WDM/SCM-PON Systems
Broadband Wired/Millimeter-Wave Band Transmission Broadcasting Signal RSOA for WDM/SCM-PON Systems
2009/7/17
A novel scheme of simultaneous broadband data transmission for both wired and millimeter-wave band with broadcasting signal is proposed based on a directly modulated amplified spontaneous emission usi...
Polarization-Multiplexed Multilevel LDPC-Coded Modulation for Optical Communication Systems
Polarization-Multiplexed Multilevel LDPC-Coded Modulation Optical Communication Systems
2009/7/17
Polarization-multiplexed coded-modulation, with joint coherent MAP detection and soft-iterative decoding, which considers independent symbols transmitted over both polarizations as a super-symbol is p...
Experimental Characterisation of the Impact of Neighbouring Modulation- Formats on 43Gb/s P-DPSK over SSMF and LEAF
Neighbouring Modulation- Formats SSMF LEAF
2009/7/17
We report an experimental characterisation examining the impact of differing 50GHz neighbouring modulation formats and bit rates on the performance of 43Gb/s P-DPSK over 1300km of SSMF and LEAF TM fib...
Optical trellis-coded modulation with multi-parallel MZM
Optical trellis-coded modulation multi-parallel MZM
2009/7/17
We demonstrated trellis-coded modulation onto 10-Gbaud 16QAM by electro-optic vector digital-to-analogue converter employing multi-parallel MZM and trellis encoder. The signal was demodulated with a d...
W-band 3.75-Gb/s 8PSK Wireless Signal Generation and Transmission via Optical Frequency Octupling and Bias Modulation of NBUTC-PD with Feed-Forward Equalizer
Wireless Signal Generation Optical Frequency Octupling NBUTC-PD Feed-Forward Equalizer
2009/7/17
Generation and transmission of a wireless W-band 8PSK signal with 3.75-Gb/s data rate are experimentally demonstrated. The W-band carrier is generated from millimeter-wave generation with frequency oc...
Impact of Non-Ideal Pulse Carving Induced Phase Distortions on QPSK based Modulation Format
Non-Ideal Pulse Induced Phase Distortions QPSK Modulation Format
2009/7/17
We investigate impact of non-ideal pulse carver induced phase distortions on QPSK format. The results show that only 0.5 dB amplitude imbalance of sinusoidal wave applied into carver produces 2 dB ONS...
160 Gbit/s OTDM System Based on 40 GHz Optical Pulses Generated Using Simultaneous Two-Arm Modulation of a Mach-Zehnder Modulator
OTDM System Optical Pulses Generated Mach-Zehnder Modulator
2009/7/17
Bit-error-rate free performance of 160 Gbit/s OTDM data based on 1.9 ps 40 GHz optical pulses generated by simultaneous two-arm modulation of a Mach-Zehnder intensity modulator has been demonstrated.
Measurement of Fiber Chromatic Dispersion Using Spectral Interferometry with Modulation of Dispersed Laser Pulses
Chromatic Dispersion Spectral Interferometry Modulation Dispersed Laser Pulses
2009/7/16
We propose and experimentally demonstrate a simple accurate method for fiber dispersion measurement based on modulation of laser pulses stretched by the tested fiber. The spectral interferometry is im...
High Spectral Efficiency Phase and Quadrature Amplitude Modulation for Optical Fiber Transmission–Configurations, Trends, and Reach
High Spectral Efficiency Phase Quadrature Amplitude Modulation Optical Fiber Transmission–Configurations
2009/7/16
Catering to the current interest in high-order modulation formats, this paper discusses possible transmitter configurations and receiver concepts. Moreover, the major trends in system performance are ...
95 ˚C Uncooled and High Power 25-Gbps Direct Modulation of InGaAlAs Ridge Waveguide DFB Laser
95 ˚ C Uncooled Direct Modulation Waveguide DFB Laser
2009/7/16
95˚C, 25-Gbps direct modulation of a high-power (>15mW) 1.3-μm-InGaAlAs-DFB laser is developed for the first time. The device will be a key for 4-channel CWDM uncooled light-sources used in the l...
First Complex Coupled 1490nm CSDFB Lasers:High Yield,Low Feedback Sensitivity,and uncooled 10Gb/s Modulation
Complex Coupled CSDFB Lasers High Yield,Low Feedback Sensitivity
2009/7/16
1490nm complex-coupled CSDFB lasers with excellent single mode yield, high optical output power,uncooled 10Gb/s performance and low feedback sensitivity are presented for the first time.
1.55 μm InP-based Short-Cavity-VCSELs with Enhanced Modulation-Bandwidth of 15 GHz
Short-Cavity-VCSELs Enhanced Modulation-Bandwidth
2009/7/16
InP-based burried tunnel junction VCSELs incorporating a novel short-cavity design are presented.These devices show record-high modulation-bandwidths in excess of 15 GHz together with greatly enhanced...
High Bit Rate Transmission for NG-PON by Direct Modulation of DFB Laser using Discrete Multi-Tone
Transmission NG-PON Direct Modulation DFB Discrete Multi-Tone
2009/7/16
A bit rate as high as 19Gbit/s transmission was experimentally demonstrated for NG-PON without chromatic dispersion compensation by direct modulation of DFB laser using DMT signal combined with adapti...
Modulation Formats for Ultra Long-Haul Undersea Transmission
Modulation Formats Ultra Long-Haul Undersea Transmission
2009/7/16
This paper reviews recent technology advances in modulation formats including RZ-DQPSK, PDM RZ-DPSK, and offset PDM RZ-DPSK for 40G undersea transmission. Research activities on 100G long-haul transmi...