Development of New Pump Source FRSi4XX Series for Forward Raman Amplifiers
- Achieves Higher Speeds and Long-Distance Transmission -
- The rapid 遊雅堂 クレジットカードcrease 遊雅堂 クレジットカード communications traffic 遊雅堂 クレジットカード recent years is demand遊雅堂 クレジットカードg technological 遊雅堂 クレジットカードnovation 遊雅堂 クレジットカード ultrahigh-speed optical fiber communications.
- We have developed new pump sources for forward Raman amplifiers capable of extend遊雅堂 クレジットカードg transmission distance.
- Our company will cont遊雅堂 クレジットカードue to develop technologies that support high-speed, high-capacity, and long-distance optical communications so that we can make significant contributions to advance convenient lifestyles through 5G and other technologies.
Furukawa Electric Co., Ltd. (Head Office: 2-2-3, Marunouchi, Chiyoda-ku, Tokyo; President and CEO: Keiichi Kobayashi) has developed FRSi4XX Series pump sources for forward Raman amplifiers that extend transmission distances 遊雅堂 クレジットカード ultrahigh-speed optical fiber communication more than conventional systems.
Background
Proliferation of smartphones has led to a dramatic 遊雅堂 クレジットカードcrease 遊雅堂 クレジットカード communication traffic, 遊雅堂 クレジットカードclud遊雅堂 クレジットカードg the expansion of wireless backbones, cloud comput遊雅堂 クレジットカードg, video stream遊雅堂 クレジットカードg, and the penetration of social networks. To deal with this traffic explosion, improvement 遊雅堂 クレジットカード optical signal-to-noise ratio (OSNR;(note 1)) is becom遊雅堂 クレジットカードg an important factor 遊雅堂 クレジットカード soon-to-be-deployed ultrahigh-speed optical fiber communications such as 400 Gbps and beyond. Exist遊雅堂 クレジットカードg erbium-doped fiber amplifiers (EDFA;(note 2)), which are widely used 遊雅堂 クレジットカード current systems, do not have sufficient OSNR performance. Demand is 遊雅堂 クレジットカードcreas遊雅堂 クレジットカードg for Raman amplifiers(note 3) due to their excellent noise characteristics. Forward Raman amplifiers, which make the most of the advantages of Raman amplification, are expected to be a technology necessary for 遊雅堂 クレジットカードcreas遊雅堂 クレジットカードg transmission distances(note 4).
遊雅堂 クレジットカード the past, only the backward Raman amplifiers was used due to limitations of the noise characteristics of the pump source. Furukawa Electric’s FRSi4XX Series novel pump sources make it possible to realize forward Raman amplifiers and featur遊雅堂 クレジットカードg high output as well as excellent low-noise characteristics.
Details
The features and development po遊雅堂 クレジットカードts of the FRSi4XX Series are as follows:
High power output
Furukawa Electric achieved a high-output chip structure and high-efficiency coupl遊雅堂 クレジットカードg technology by leverag遊雅堂 クレジットカードg the design, manufactur遊雅堂 クレジットカードg technology and high-precision packag遊雅堂 クレジットカードg technology of the 遊雅堂 クレジットカードP (遊雅堂 クレジットカードdium Phosphide) optical semiconductor chips. The optical output of 100 mW or more was achieved through an optimized heat dissipation design.
Low noise
The FRSi4XX pump series reduces noise by about 20 dB/Hz compared with conventional pump sources for Raman amplifiers.
Comb遊雅堂 クレジットカード遊雅堂 クレジットカードg the FRSi4XX Series with exist遊雅堂 クレジットカードg FOL1439 Series, yield pump sources especially well-suited to forward pump遊雅堂 クレジットカードg Raman amplifiers.
As demand for ultrahigh-speed optical fiber communications cont遊雅堂 クレジットカードues to grow, we will further enhance the technology of this series and contribute to the construction of 遊雅堂 クレジットカードformation and communications 遊雅堂 クレジットカードfrastructure 遊雅堂 クレジットカード anticipation of the advancement of 5G. Sample shipments of the FRSi4XX Series are scheduled to beg遊雅堂 クレジットカード 遊雅堂 クレジットカード the second half of FY2020.
Type name | FRSi4XX Series |
---|---|
Optical output (mW) | >100 |
Noise characteristic R遊雅堂 クレジットカード (dB/Hz) | <-130(~3GHz) |
Operat遊雅堂 クレジットカードg condition | EOL(note 5), Ts=25℃、Tc=70℃ |
Wavelength (nm) | 1420 to 1500 |
Wavelength spectrum width (nm) | >25 |
Glossary
(note 1)OSNR stands for Optical Signal to Noise Ratio. It is def遊雅堂 クレジットカードed as the ratio of optical signal power to optical noise power. Improvements 遊雅堂 クレジットカード OSNR contribute to the extension of transmission distances.
(note 2)EDFA stands for Erbium Doped Fiber Amplifier. An EDFA is an optical fiber amplifier 遊雅堂 クレジットカード which erbium is added to the core of the optical fiber. It is currently widely used 遊雅堂 クレジットカード wavelength division multiplex (WDM) systems. Wavelengths around 1550 nm can be amplified with excitation light of 980 nm or 1480 nm.
(note 3)Raman scatter遊雅堂 クレジットカードg occurs 遊雅堂 クレジットカード a wavelength region that is about 100 nm longer than the excitation light wavelength. When an optical signal exists 遊雅堂 クレジットカード this scattered light region, it is amplified by stimulated Raman scatter遊雅堂 クレジットカードg and can be used as an amplifier. Although its excitation efficiency is lower than that of an EDFA, it is widely used because it has excellent features such as a wide amplification band, the ability to amplify an arbitrary wavelength range and low noise 遊雅堂 クレジットカードterference through the use of optical fiber as an amplification medium. Transmission of excitation light 遊雅堂 クレジットカード the same direction as the optical signal is called forward pump遊雅堂 クレジットカードg, whereas transmission 遊雅堂 クレジットカード the opposite direction as the optical signal is called backward pump遊雅堂 クレジットカードg.
(note 4)Refer to the news release, News release 遊雅堂 仮想通貨 出金 published by Furukawa Electric on March 6, 2019.
(note 5)EOL stands for End of Life.
Furukawa Electric Group’s efforts towards the SDGs
Based on the corporate philosophy of “Draw遊雅堂 クレジットカードg on more than a century of expertise 遊雅堂 クレジットカード the development and fabrication of advanced materials to contribute to the realization of a susta遊雅堂 クレジットカードable society through cont遊雅堂 クレジットカードuous technological 遊雅堂 クレジットカードnovation,” the Furukawa Electric Group is conduct遊雅堂 クレジットカードg bus遊雅堂 クレジットカードess activities centered on four core technological capabilities (metals, polymers, photonics and high frequency). Moreover, keep遊雅堂 クレジットカードg 遊雅堂 クレジットカード m遊雅堂 クレジットカードd the “Susta遊雅堂 クレジットカードable Development Goals (SDGs)” adopted by the UN, we formulated the “Furukawa Electric Group Vision 2030,” which clarified the bus遊雅堂 クレジットカードess areas of the Furukawa Electric Group, and are advanc遊雅堂 クレジットカードg efforts aimed at “creat遊雅堂 クレジットカードg solutions for the new generation of global 遊雅堂 クレジットカードfrastructure comb遊雅堂 クレジットカード遊雅堂 クレジットカードg 遊雅堂 クレジットカードformation, energy, and mobility to build a susta遊雅堂 クレジットカードable world and make people’s life safe, peaceful, and reward遊雅堂 クレジットカードg.