89 km 10 Gbit/s 1310 nm repeaterless transmission experiments usingdirect laser modulation and two SL-MQW laser preamplifiers with lowpolarization sensitivity

An unrepeatered 89 km 1310 mn 10 Gbit/s transmission experiment has been carried out for the first time employing an SL-MQW DFB laser diode and a high sensitivity optical front end with 1310 nm strained layer MQW optical amplifiers, enabling a total power budget of 35.8 dB. A record receiver sensitivity of -30.3 dBm at 10 Gbit/s @1310 nm has been demonstrated     

High-sensitivity and wide-dynamic-range 10 Gbit/s APD/preamplifieroptical receiver module

InAlAs avalanche photodiodes (APD) and SiGe-HBT preamplifier 10 Gbit/s optical receiver modules have been developed. The measured back-to-back minimum sensitivity and the optical overload with a pseudorandom binary sequence of 2³¹ - 1 at a bit error rate of 10^-9 are -29.5 and +0.4 dBm, respectively. The dynamic range is 29.9 dB. These results show the highest sensitivity and the widest dynamic range yet reported for 10 Gbit/s APD receivers     

2.5Gbit／s SDH系统用光接收模块研究

介绍了２．５Ｇｂｉｔ／ｓＳＤＨ光接收机设计原理，并研制出实用化的高灵敏度，大动态范围的２．５Ｇｂｉｔ／ｓＳＤＨ系统用光接收模块，光接口符合ＩＴＵ－Ｔ建议，Ｇ．９５７规范的要求，该模块已用于武汉邮电科学研究辽研制的２．５Ｇｂｉｔ／ｓＳＤＨ光传输系统中。     

Optical duobinary transmission system with no receiver sensitivitydegradation

The authors propose a novel optical duobinary transmission system with no receiver sensitivity degradation. The transmitter yields a narrowband optical signal, and the receiver configuration is as simple as a binary IM-DD receiver. The feasibility of the proposed system is experimentally confirmed at 2.5, 5 and 10 Gbit/s     

1.2 Gbit/s, 52.5 km optical fibre transmission experiment usingOEICs on GaAs-on-InP heterostructure

High-performance, long-wavelength OEICs on a GaAs-on-InP heterostructure were fabricated. For the transmitter OEIC, high-speed operation up to 2.4 Gbit/s was achieved, and a receiver sensitivity as high as -26.0 dBm for a 1.2 Gbit/s NRZ signal was realised for the receiver OEIC. To confirm the usefulness of these OEICs for optical fibre networks, a 1.2 Gbit/s optical fibre transmission experiment was successfully carried out over a 52.5 km span     

10 Gbit/s optical PSK homodyne transmission experiments using external cavity DFB LDs

10 Gbit/s optical PSK homodyne transmission experiments using a modified decision-driven optical phase locked loop with 1.55 mu m external cavity laser diodes were conducted. A receiver sensitivity of -34.2 dBm or 297 photon/bit was experimentally achieved. There was no degradation in receiver sensitivity after signal transmission through 151 km of dispersion shifted fibre.<>     

Simple and spectrally-efficient design of high capacity hybrid WDM/TDM-PON with improved receiver sensitivity

A simple design of hybrid wavelength division multiplexed/time division multiplexed passive optical network （WDM/ TDM-PON） is demonstrated for the high capacity next generation access （NGA） network, having advantages of both WDM and TDM based PON techniques. A 10 Gbit/s differential quadrature phase shift keying （DQPSK） data signal is used at optical line terminal （OLT） for downstream, whereas a 2.5 Gbit/s inverse return-to-zero （IRZ） data signal with high extinction ratio is used for upstream signal by intensity re-modulation of downstream signal, no additional laser is used at optical network unit （ONU）. Simulation results verify that aggregated 100 Gbit/s downstream transmissions of 10 DQPSK channels and aggregated 25 Gbit/s upstream transmission of 10 IRZ channels, using spectrally-efficient 50 GHz channel spacing, can be successfully achieved over a distance of 20 km with less than 1 dB transmission power penalties and improved receiver sensitivity.     

用于10Gbit／sSDH光传输系统的光接收机

本文介绍了一种用于１０Ｇｂｉｔ／ｓＳＤＨ光传输系统的光接收机。该接收机的光接口指标可满足ＩＴＵ－ＴＧ．ＳＣＳ建议的要求。已将该接收机用于１０Ｇｂｉｔ／ｓ光纤传输实验。     

准相干技术在C波段25 Gbit/s光模块中的研究与应用

针对传统C波段高速光模块传输距离过短的问题,文章对一种准相干接收技术进行了研究,结合现有25 Gbit/s光模块进行了实验,并讨论了准相干接收技术的应用方案.研究发现,准相干接收技术以外差相干检测技术为基础,具有结构简单和成本低等优点,在不使用额外的电或光色散补偿技术的前提下,准相干接收机也能有效减少色散对高速光模块传...     

A Burst-Mode 3R Receiver for 10-Gbit/s PON Systems With High Sensitivity, Wide Dynamic Range, and Fast Response

The burst-mode 3R receiver using monolithic ICs for 10-Gbit/s-class optical access networks is reported. In a point-to-multipoint access system like a passive optical network (PON), the receiver at the optical line terminal (OLT) must be able to handle burst-mode optical packets with significantly different powers and phases. An OLT receiver with high sensitivity with instantaneous response to burst inputs is desired for widening the accommodation area and for high efficiency in PON uplinks. Currently, the diffusion of high-speed Internet connection services represented by fiber to the home services at 1.25 Gbit/s is remarkable and the standardization of the next-generation system operating at 10 Gbit/s has started in IEEE. We first discuss the issues in the implementation of 10-Gbit/s-class PON systems, focusing on securing the accommodation area and the quality of the service comparable with those of the deployed system. Against that background, we propose target specifications for sensitivity, a dynamic range and response speed of the 10-Gbit/s-class burst-mode receiver so as to secure the power budget and the upstream efficiency comparable with those of the already-installed systems. Our burst-mode 3R receiver was designed to meet the above requirements and developed using monolithic ICs of transimpedance amplifier, limiting amplifier, and clock and data recovery circuit fabricated by using SiGe BiCMOS technologies along with a p-i-n photodiode. High sensitivity of , a wide dynamic range of over 16.5 dB, and quick response time of 75 ns were confirmed for burst inputs with extremely different powers.     

10 Gbit=s RZ-OOK to BPSK format conversion by cross-phase modulation in single semiconductor optical amplifier

A simple and power-efficient, all-optical format conversion from 10 Gbit/s RZ-OOK to BPSK is demonstrated using a single semiconductor optical amplifier and optical bandpass filtering. A receiver sensitivity penalty of ~1 dB relative to baseline RZ-OOK was obtained for ~-0.17 nm filter detuning relative to the probe carrier wavelength     

15 Gbit/s optical receiver using waveguide pin photodiode

The authors report the first optical receiver to use a waveguide pin photodiode as a high-power and high-speed photodiode. Its measured receiver sensitivity of 15 Gbit/s confirms that waveguide pin photodiodes have high-speed potential and flat frequency response under high input powers beyond +10 dBm     

Physical Media Dependent Prototype for 10‐Gigabit‐Capable PON OLT

In this work, we study the physical layer solutions for 10‐gigabit‐capable passive optical networks (PONs), particularly for an optical link terminal (OLT) including a 10‐Gbit/s electroabsorption modulated laser (EML) and a 2.5‐Gbit/s burst mode receiver (BM‐Rx) in a novel bidirectional optical subassembly (BOSA). As unique features, a bidirectional mini‐flat package and a 9‐pin TO package are developed for a 10‐gigabit‐capable PON OLT BOSA composed of a 1,577‐nm EML and a 1,270‐nm avalanche photodiode BM‐Rx, including a single‐chip burst mode integrated circuit that is integrated with a transimpedance and limiting amplifier. In the developed prototype, the 10‐Gbit/s transmitter and 2.5‐Gbit/s receiver characteristics are evaluated and compared with the physical media dependent (PMD) specifications in ITU‐T G.987.2 for XG‐PON1. By conducting the 10‐Gbit/s downstream and 2.5‐Gbit/s upstream transmission experiments, we verify that the developed 10‐gigabit‐capable PON PMD prototype can operate for extended network coverage of up to a 40‐km fiber reach.     

5 V, 10 Gbit/s optical receiver module using Si-bipolar IC

A 10 Gbit/s optical receiver module using a Si-bipolar IC has been developed. For low power and low cost, a pure Si-bipolar IC is used in place of a GaAs IC, which is commonly used for over 10 Gbit/s. To widen the frequency bandwidth, multifeedback techniques and a two-stage buffer configuration are used in the preamplifier IC. In addition, a differential circuit configuration is used for stable operation at high frequency. The IC was fabricated using 0.25 μm Si-bipolar technology. The module exhibits sensitivity of <-16 dBm for 10 Gbit/s data with an input dynamic range >15 dB. Small power consumption of 410 mW is achieved with the single power-supply voltage of +5 V     

10 GHz optical receiver using a travelling-wave semiconductor laser preamplifier

A 1.5 ?m optical receiver with a bandwidth of 10 GHz has been demonstrated. The receiver used a travelling-wave semiconductor laser preamplifier and had an equivalent input noise of 1 pA/?Hz) with a 3 dB bandwidth of 10 GHz. The estimated sensitivity at 15 Gbit/s was ?27 dBm.     

Wide bandwidth low noise pinFET receiver for high-bit-rate opticalpreamplifier applications

A wide bandwidth low noise pinFET receiver has been fabricated and characterised for optical preamplifier applications. The receiver uses a low capacitance planar pin diode as the photodetector. A bandwidth of 7.08 GHz was measured. The measured input noise current for the receiver front-end is lower than 12 pA/√(f). Using a 1.3 μm DFB laser as the transmitter, at a data rate of 4 Gbit/s, the measured receiver sensitivity is -25.5 dBm with a bit-error-rate of 1×10 ^-9. A set of two of such receivers has also been tested in a 1.3 μm polarisation-insensitive optical preamplifier system experiment. The measured receiver sensitivity, including an optical insertion loss of 1.5 dB, is -29.3 dBm     

10 Gbit/s optical front end using Si-bipolar preamplifier IC, flipchip APD, and slant-end fibre

An optical front end for a 10 Gbit/s optical receiver has been fabricated that features a 10 GHz Si preamplifier IC, a flipchip APD with an 80 GHz gain-bandwidth product, and slant-end fibre optical coupling. Hybrid construction consisting of a flipchip APD mounted directly on the preamplifier chip minimises interconnect parasitics, and slant-end fibre optical coupling simplifies flat-package assembly of chip and fibre. An optical sensitivity of -23 dBm was achieved.<>     

30Gbit/s并行光接收模块

报道了一种基于CMOS工艺接收电路芯片和GaAs工艺1×12光电探测器阵列的30Gbit/s并行光接收模块.该模块采用并行光通信方案,利用中高速光电子器件实现信号的高速传输.直接使用未经封装的接收电路裸片和光探测器裸片,采用电路板上芯片技术封装制作模块,并通过倒装焊的方式实现了探测器阵列与列阵光纤的精确对准并形成了可插拔的光接口.测试结果表明模块的接收能力可以达到30Gbit/s.误码率小于10-13时,接收模块的灵敏度可以达到-13.6dBm.     

20 Gbit/s long distance transmission using a 270 photon/bit opticalpreamplifier receiver

A 200 km nonrepeatered transmission experiment and a 400 km transmission experiment using three in-line amplifiers are carried out at 20 Gbit/s by using a simple but highly sensitive optical preamplifier receiver based on a 0.98 μm LD-pumped EDFA. High sensitivity of -31.6 dBm (270 photon/bit) at 20 Gbit/s is obtained     

2.5 Gbit/s光发射模块消光比与光接收误码特性

改变2．5Gbit/s光发射模块消光比（EX）,对作为标准接收用的光接收机灵敏度进行了测试。实验表明,EX小于9．0时,光接收灵敏度较差;EX大于15．0时,由于眼图中交叉点偏低或光脉冲波形畸变,可能导致光接收灵敏度恶化;EX在9．0－12．0范围时,光接收灵敏度最佳。