搜索结果: 46-60 共查到“光学工程 Modulation”相关记录144条 . 查询时间(0.049 秒)
Line Coding for Downlink DML Modulation in λ λ-Shared, RSOA-based Asymmetric Bidirectional WDM PONs
Line Coding Downlink DML Modulation λ λ-Shared RSOA-based Asymmetric Bidirectional WDM PONs
2011/5/20
We experimentally investigate the use of various DC-balanced line codes for downlink modulation in single-fiber, wavelength-shared WDM-PON systems which employ 10-Gbps directly modulated lasers and 2....
Cycle Slip Mitigation in POLMUX-QPSK Modulation
Cycle Slip Mitigation POLMUX-QPSK Modulation
2011/5/20
We demonstrate a pilot-symbol assisted joint polarization carrier phase estimation technique that detects cycle slip and avoid error propagation. Coherent detection without differential coding is feas...
Low-Complexity, Blind Phase Recovery for Coherent Receivers Using QAM Modulation
Low-Complexity Blind Phase Recovery Coherent Receivers QAM Modulation
2011/5/20
We propose a new hybrid PLL/ML phase estimation method for low-complexity, blind phase recovery for M-QAM modulation. The linewidth tolerance of the proposed method is more than one order of magnitude...
300 Mbps Transmission with 4.6 bit/s/Hz Spectral Efficiency over 50 m PMMA POF Link Using RC-LED and Multi- Level Carrierless Amplitude Phase Modulation
300 Mbps Transmission 4.6 bit/s/Hz Spectral Efficiency PMMA POF Link Multi- Level Carrierless Amplitude Phase Modulation
2011/5/18
Successful transmission of up to 300 Mbps over a 50 m long POF link using a commercially available Fast Ethernet capable RC-LED is presented. Carrierless Amplitude Phase modulation was used with 16- a...
A High-Speed Visible Light Indoor Network Employing a Short Pulse Modulation and a QPM-LN Module
High-Speed Visible Light Indoor Network Short Pulse Modulation QPM-LN Module
2011/5/18
We propose the concept of over-gigabit visible light indoor networks using λ-conversion achieved by combining a short pulse modulator with a QPM-LN module. Error free operation at 1.25 Gb/s is confirm...
7×10-Gbit/s All-optical Wavelength Multicast based on Cross-gain Modulation and Cascaded Four-wave Mixing Effects in an SOA Using Single Pump Laser Source
All-optical Wavelength Cross-gain Modulation Cascaded Four-wave Mixing
2011/5/15
By combining XGM, and cascaded FWM effects in an SOA, seven multicast channels with 100-GHz spacing are demonstrated using single pump laser source. The power penalty of these multicast channels is le...
Modulation-Format-Free Bias Control Technique for MZ Modulator Based on Differential Phasor Monitor
MZ Modulator Phasor Monitor Modulation-Format-Free Bias Control
2011/5/15
We propose a novel bias control technique based on the differential phasor monitor for the LiNbO 3 modulator. For demonstrations, the proposed bias control technique was used for 20-Gb/s QPSK and 43-G...
The Impact of the Combined 8-QAM and QPSK Subcarrier Modulation for Coherent Optical OFDM
8-QAM QPSK Subcarrier Modulation OFDM
2011/5/15
We investigated the optimized signal condition of the combined 8-QAM and QPSK subcarrier modulation for optical OFDM. The performance improvement was confirmed by WDM transmission experiments with the...
A Modulation Scheme for 100Gb/s Minimum-Shift Keying Format based on Imbalanced Bias in IQ Components
Minimum-Shift Keying IQ Components Imbalanced Bias
2011/5/15
We propose an optical MSK modulation scheme to achieve the 100Gb/s MSK signal with constant envelope and continuous temporal phase shift. The investigation on the transmission performance clearly demo...
Coded Multidimensional Pulse Amplitude Modulation for Ultra-high-speed Optical Transmission
Coded Multidimensional Pulse Amplitude Modulation ltra-high-speed Optical Transmission
2011/5/15
We propose a coded N-dimensional pulse-amplitude modulation (ND-PAM) suitable for ultra-high-speed serial optical transport. The polarization-multiplexed-ND-PAM significantly outperforms corresponding...
Spectral Target-Detecting System Using Sine-Wave Modulation
Sine-wave modulation Analog Target detection Optical spectrum
2010/12/14
Target detection is one of the key technology of precision chemical application. Previously the digital coding modulation technique was commonly used to emit and receive the optical signal in the targ...
Compensation of Cross-gain Modulation in Filtered Multi-channel Optical Signal Processing Applications
Fiber optics communications Phase modulation Radio frequency photonics
2010/6/10
We experimentally demonstrate compensation of nonlinearity due to cross-gain modulation in wideband analog systems employing narrow-band optical filtering, which is essential for multi-channel optical...
Optical Packet Ring Network Offering Bit Rate and Modulation Formats Transparency
All-optical networks Switching packet
2010/6/10
We demonstrate the feasibility of a bit rate transparent ring packet network based on a Packet-OADM technology. A lab network has been successfully evaluated at 10, 40 and 100G.
Use of discrete modulation and a continuous wave local oscillator in a 24 km continuous variable quantum key distribution system
Quantum cryptography Quantum communications
2010/6/10
We implement an experimental continuous variable quantum key distribution system over 24 km of optical fiber that uses discrete signaling and a continuous wave local oscillator. A secure key rate of 3...
Very High Bit Rate Transmission for NGPON using AMOOFDM Direct Modulation of Linear Laser
Fiber optics communications Modulation
2010/6/9
Experimental demonstration of a bit rate as high as 32 Gbit/s is achieved over 20 km SMF for NGPON in a temperature range of 5°C-60°C using AMOOFDM direct modulation of a linear laser.