Masamichi Nogami

10.3-Gb/s Burst-Mode 3R Receiver Incorporating Full AGC Optical Receiver and 82.5-GS/s Over-Sampling CDR for 10G-EPON Systems

In this letter, we developed, for the first time, 10.3-Gb/s burst-mode 3R receiver incorporating a full automatic gain control optical receiver and 82.5-GS/s over-sampling clock and data recovery (CDR) for 10G-EPON. Burst-mode preamplifier, limiting amplifier, and CDR were newly fabricated on 0.13-¿m SiGe bipolar complementary metal-oxide-semiconductor process to completely meet the IEEE802.3av 10G-EPON standards. The 10.3-Gb/s burst-mode 3R receiver successfully achieves the burst receiver sensitivity of -30.1 dBm (at bit error rate (BER) =1 ×10-3) and the dynamic rage more than 24.1 dB (at BER=1 ×10-3) with the assistance of FEC RS(255, 223).

A Burst-Mode Bit-Synchronization IC With Large Tolerance for Pulse-Width Distortion for Gigabit Ethernet PON

A burst-mode bit-synchronization IC applied to the upstream transmission in a gigabit Ethernet passive optical network (PON) was experimentally verified to have a large tolerance for pulse-width distortion within plusmn0.66 UI. The extra tolerance of 0.22 UI over the IEEE 802.3ah specification can be assigned to additional distortion generated at an optical receiver incorporated into an optical line terminal. Such a large tolerance was attained by precisely generated eight-phase clocks based on theoretical analyses of distortion tolerance considering real circuit parameters and by an enhanced data selector incorporating a pulse-width detector to monitor the pulse-widths of isolated bits. The IC developed includes a burst into series transformer to permit connection to commercially available PON LSI developed for serial data transmission in Ethernet systems. The theoretical study into the numbers of allowable bit errors and consecutive pattern matches in byte synchronization established following two conditions: 1) allowable error more than one bit in synchronization pattern with 10-bit length was required to hold the synchronization loss rate to less than a few times per year and 2) consecutive pattern matching more than twice was required to hold the synchronization error rate to less than a few times per year

First demonstration of 10G-EPON and GE-PON co-existing system employing dual-rate burst-mode 3R transceiver

Novel 10G-EPON dual-rate burst-mode 3R transceiver with receiver sensitivity of -31.2dBm for 10.3Gb/s and -35.6dBm for 1.25Gb/s was developed. 10G-EPON and GE-PON coexisting system of 32x ONUs with loss budget of 33.5dB was successfully demonstrated.

An ultra-broadband GaAs MESFET preamplifier IC for a 10 Gb/s optical communication system

An ultrabroadband GaAs MESFET preamplifier IC was developed for a 10-Gb/s optical communication system. A high transimpedance of 44 dB- Omega has been obtained from DC to 12 GHz. A receiver has also been fabricated by using this preamplifier IC and a photodiode. The receiver operated with an extremely low equivalent input noise current of 12.6 pA/ square root Hz from DC to 7.8 GHz. The circuit design and the high-frequency characteristics of the preamplifier IC and the receiver are described. >

Dual-rate optical transceiver incorporating fully optimized burst-mode AGC/ATC functions for 10G-EPON systems

10G-EPON dual-rate transceiver with receiver sensitivity of −30.8dBm for 10.3125Gb/s and −35.5dBm for 1.25Gb/s due to fully optimized burst-mode AGC/ATC functions was developed. A high launch power and low dispersion penalty transmission were also achieved.

10 Gb/s-Based PON Over OCDMA Uplink Burst Transmission Using SSFBG Encoder/Multi-Port Decoder and Burst-Mode Receiver

In this paper, we propose a novel 10 Gb/s-based passive optical network (PON) over optical code division multiple access (OCDMA) system to realize the new generation full capacity optical access network which is easily upgraded from existing time division multiplexing PON (TDM-PON) without sacrificing the currently uplink bandwidth assigned to the individual user. 16-ONU (4-OCDMA x 4-packet) uplink burst transmission, an upgrade scenario by a factor of four of conventional 10 Gb/s-based PON, is experimentally demonstrated by using multi-level phase-shift-keying (PSK) super-structured fiber Bragg grating (SSFBG) encoder/multi-port decoder and burst-mode receiver. In the discussions, it will be shown that 32 users can be accommodated in 10 Gb/s-based PON over OCDMA system, and a key is newly introduced multi-level phase-shifted en/decoding, of which auto-correlation waveform can be preferably adopted in the burst-mode reception at 10 Gb/s.

A 10.3 Gbit/s LAN-PHY based Burst-mode Transmitter with a fast 6 ns turn-on/off time for 10 Gbps-based PON Systems

A novel 10.3 Gbit/s LAN-PHY based burst-mode transmitter with a fast 6 ns turn-on/off time and a high launch power more than +3.3 dBm over the temperature range 0 to 70 degree-C was successfully demonstrated by using a new impedance-controlled DC-coupled burst-mode LD driver circuit.

Demonstration of 10G-EPON and GE-PON Coexisting System Employing Dual-Rate Burst-Mode 3R Transceiver

In this letter, a novel 10 gigabit Ethernet passive optical network (10G-EPON) optical line terminal (OLT) dual-rate burst-mode reshaping, retiming, and regenerating transceiver was, for the first time, reported to completely meet the IEEE802.3 av 10G-EPON standards where the coexisting of 10G-EPON and gigabit Ethernet passive optical network (GE-PON) systems on the same fiber plant is specified. Newly developed 10G/1G dual-rate burst-mode avalanche photodiode preamplifier and dual-rate 82.5-GS/s burst-mode clock and data recovery achieved the high receiver sensitivity and the wide burst dynamic range of -31.2 dBm/25.2 dB (at bit-error rate (BER) = 1 X 10-3) for 10.3 Gb/s and -35.6 dBm/26.3 dB (at BER = 1 x 10-12) for 1.25 Gb/s. Moreover, 10G-EPON and GE-PON coexisting system of 32 x optical network units with loss budget of 33.5 dB was successfully demonstrated.

Symmetric 10G-EPON ONU transceiver integrated with newly-developed burst-mode pre-bias timing control IC

We developed symmetric 10G-EPON ONU transceiver fully compliant with IEEE802.3av PR30. Output power of +5 dBm, sensitivity of -32.4 dBm, and fast LD turn-on/off time of 10 ns/7 ns were successfully achieved by newly-developed burst-mode pre-bias timing control IC.

Prototype of Uplink Transceiver for IFDMA-PON System by FPGA Emulation

We demonstrate a power-efficient coherent interleaved frequency domain multiple access passive optical network (IFDMA-PON) uplink system. The digital signal processing circuits for coherent IFDMA-based quadrature phase-shift keying (PSK) are implemented on 40-nm field programmable gate arrays. By employing polar-coordinate transformed mapping of the PSK signal, the power consumption of the optical network unit is reduced to one-tenth that of conventional orthogonal frequency-division multiple access-PON systems. The transmission of a 6 Gb/s real-time coherent IFDMA-PON uplink signal across 20 km of single mode fiber is demonstrated for the first time.