Single-Channel 400-Gb/s OTDM-32 RZ/QAM Coherent Transmission Over 225 km Using an Optical Phase-Locked Loop Technique

Kasai, Keisuke; Omiya, Tatsunori; Guan, Pengyu; Yoshida, Masato; Hirooka, Toshihiko

doi:10.1109/lpt.2010.2042708

Cited by 20 publications

(5 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To overcome these limitations, coherent optical time division multiplexing (OTDM) has been demonstrated that employs multi-level QAM modulation for ultrashort optical pulses. [5][6][7] However, typical pulse waveforms such as Gaussian or sech profiles generally occupy a large bandwidth in the frequency domain and thus may not be an appropriate waveform in terms of SE. We recently proposed a new type of optical pulse, which we call an "optical Nyquist pulse", whose shape is given by the sinc-function-like impulse response of the Nyquist filter shown in Fig.…”

Section: First "M": Multi-level Coherent Transmission With An Ultrahi...mentioning

confidence: 99%

Exabit optical communication explored using 3M scheme

Nakazawa

2014

Jpn. J. Appl. Phys.

Self Cite

View full text Add to dashboard Cite

The capacity of the optical communication infrastructure in backbone networks has increased 1000-fold over the last 20 years. Despite this rapid progress, internet traffic is continuing to grow at an annual rate of 40%. This means that in 20 years, we will need petabit/s or even exabit/s optical communication. In this paper, we present recent challenges and efforts toward achieving a hardware paradigm shift to overcome the capacity limitation imposed by the current optical communication infrastructure. We will overview the latest advances on the three “multi” technologies, i.e., multi-level transmission with ultrahigh spectral efficiency, space division multiplexing in multi-core fibers, and mode division multiplexing with multiple-input multiple-output (MIMO).

show abstract

Section: First "M": Multi-level Coherent Transmission With An Ultrahi...mentioning

confidence: 99%

Exabit optical communication explored using 3M scheme

Nakazawa

2014

Jpn. J. Appl. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

“…A stable optical short pulse train (or optical comb) with a GHz repetition rate at 1550 nm is in great demand for a number of applications, such as ultrahighspeed coherent optical transmission [1,2], optical arbitrary waveform generation [3], astronomical spectrograph calibration [4], and microwave frequency transfer via optical fiber networks [5]. Many of these applications require optical frequency stabilization of the GHz optical pulse source.…”

Section: Introductionmentioning

confidence: 99%

A Cesium optical atomic clock with high optical frequency stability

Tokuhira

Suzuki

Yoshida

2012

IEICE Electron. Express

Self Cite

View full text Add to dashboard Cite

Abstract:We describe the greatly improved performance of a 1.5 μm optical frequency stabilized Cs atomic clock composed of a mode-hopfree mode-locked fiber laser and an acetylene optical frequency standard. The output pulse width was shortened from 7.1 to 3.4 ps by employing a phase modulator instead of an intensity modulator as a mode-locker. The optical frequency stability for an averaging time of 100 s was also improved from 1.8 × 10 −11 to 6.3 × 10 −12 by precisely controlling the laser cavity temperature. Keywords: Cs optical atomic, optical frequency stabilization, short pulse Classification: Optoelectronics, Lasers and quantum electronics, Ultrafast optics, Silicon photonics, Planar lightwave circuits Technol. Lett., vol. 22, no. 8, pp. 562-564, April 2010. [3] Z. Jiang, C. Huang, D. E. Leaird, and A. M. Weiner, "Optical arbitrary waveform processing of more than 100 spectral comb lines," Nat. References

show abstract

“…This scheme also has diverse variants, such as SOA-array integrated on PLC [18] and Mach-Zehnder interferometer (MZI)-SOA [19] . On the other hand, in order to further increase bit rate or improve spectral efficiency, advanced modulation formats, such as quadrature phase shift keying (QPSK) [20,21] , 16 quadrature amplitude modulation (16QAM) [22,23] and even 32QAM [24] , have been utilized. In contrast, QPSK is most attractive since it could provide the best tradeoff between system complexity and spectral efficiency.…”

mentioning

confidence: 99%

Half baudrate electrical clock based demultiplexing scheme for OTDM-DQPSK signal using SOA and optical f ilter

Wang¹,

Kong²,

Li³

et al. 2012

中国光学快报

View full text Add to dashboard Cite

A demultiplexing scheme based on semiconductor optical amplifier (SOA) and optical filter for optical time division multiplexing differential quadrature phase shift keying (OTDM-DQPSK) system is proposed and investigated experimentally. With only a common half baudrate electrical clock modulated 33% duty cycle return-to-zero (RZ-33) optical clock signal as pump, this scheme is cost-effective, energy-efficient, and integration-potential. A proof-of-concept experiment is carried out for the demultiplexing of a 2×40-GBd OTDM-DQPSK signal. Error-free performance is demonstrated, and the average power penalty for both channels is about 3 dB.

show abstract

Single-Channel 400-Gb/s OTDM-32 RZ/QAM Coherent Transmission Over 225 km Using an Optical Phase-Locked Loop Technique

Cited by 20 publications

References 7 publications

Exabit optical communication explored using 3M scheme

Exabit optical communication explored using 3M scheme

A Cesium optical atomic clock with high optical frequency stability

Half baudrate electrical clock based demultiplexing scheme for OTDM-DQPSK signal using SOA and optical f ilter

Contact Info

Product

Resources

About