米兰ac体育 Release

Furukawa Electric Co., Ltd. (Head 米兰ac体育fice: 2-6-4 Otemachi, Chiyoda-ku, Tokyo; President: Hideya Moridaira) developed a small S-,C-,L-band dual port pump laser for Raman amplifiers that has high output and low power consumption.

As data transmission speed increases, the transmission distance decreases due to degradation 米兰ac体育 the OSNR^{(note 1)}on the signal receiving side. In particular, when existing communication systems are used at faster transmission speeds, the role 米兰ac体育 the Raman amplifier, which can amplify optical output power without attenuation 米兰ac体育 the signal light quality, will become more important. Also, because the bandwidth 米兰ac体育 the signal expands as a result 米兰ac体育 high-speed transmission, it is necessary to extend the bandwidth in order to enable high volume transmission. Thus, Raman amplifiers need to have high flexibility to amplify the light source at a discretionary range based on the selection 米兰ac体育 the pump laser wavelength. On the other hand, with consideration for the expansion into the S-, C-, L-band in the future, the number 米兰ac体育 pump lasers used will increase, so it will be more important for them to have small size platform, high output power and low power consumption.

In October 2022, Furukawa Electric achieved 800mW output in the C-band, and also expanded the lineup to include a 700mW pump laser for the S-band and low power consumption 500mW pump laser for the L-band. Product sample shipments 米兰ac体育 these pump lasers began in April. Through the commercialization 米兰ac体育 the FRL1441U Series, we have reduced the power consumption 米兰ac体育 the pump lasers used for existing Raman amplifiers in the S-,C-,L-band by 37% and made it possible to reduce the space used by using only 1 pump laser instead 米兰ac体育 the previous 2 units. The current new development pursues further space saving through a dual port pump laser for Raman amplifiers that has 2 optical output ports within the existing 14 pin butterfly package.
米兰ac体育 module concept is shown in Fig. 1. Two different semiconductor laser chips are equipped in a 14 pin butterfly package, and 米兰ac体育 light is coupled in 米兰ac体育 optical fiber using optical coupling technology.
In the operating current-output power curve (laser temperature 米兰ac体育 35℃, Fig. 2) 米兰ac体育 a prototype equipped with 500mW chips from the leading FOL1439R Series, the horizontal axis shows total operating current by both ports and the vertical axis shows total fiber output 米兰ac体育 both ports. As a result, it was confirmed that an output 米兰ac体育 1W, which is the combined output 米兰ac体育 the two 500mW FOL1439R Series pump lasers, was achieved from a single dual port pump laser. Also, total operating current at a combined output 米兰ac体育 1W (laser temperature 米兰ac体育 35℃ and case temperature 米兰ac体育 70℃) was 15W (Fig. 3). This is equivalent to 7.5W per port, which is roughly the same power consumption as the 500mW FOL1439R Series pump laser. Going forward, with the aim 米兰ac体育 achieving higher output and lower power consumption, we will work to further enhance the performance 米兰ac体育 this pump laser through the development 米兰ac体育 laser chips with even higher output and lower power consumption.
米兰ac体育 newly developed dual port pump laser for Raman amplifiers (patented) uses our high accuracy fiber coupling technology and optical semiconductor processing technology using InP^{(note 2)}semiconductor materials developed over the past 25 years, as well as the application 米兰ac体育 our unique low loss, high efficiency semiconductor laser chip structure. The small size 米兰ac体育 the newly developed high output pump laser will make it possible to downsize the Raman amplifier unit. This downsizing will also lead to the use 米兰ac体育 fewer components, thus contributing to smaller overall system size.
Product samples will begin shipping from July 2024 with mass production planned to commence from a half year 米兰ac体育 2025.
An oral presentation for this product will be given on the first day 米兰ac体育 ECOC2023 scheduled to be held in Glasgow, Scotland in October (ECOC2023 homepage:https://ecoc2023.米兰ac体育iet.org/).
The current development was conducted and achieved as part 米兰ac体育 the National Institute 米兰ac体育 Information and Communications Technology (NICT) commissioned research “Beyond 5G – Development 米兰ac体育 extended range optical node technology for realizing ultra-high speed, large volume networks” (Key Issue 045).
Going forward, we will continue to develop high output, low power consumption laser chip technology and contribute to accelerated reductions in module power consumption and the establishment 米兰ac体育 environmentally-friendly networks.

Development 米兰ac体育 a new pump laser for high output power, low power consumption Raman amplifiers by expanding the range 米兰ac体育 the FRL1441U Series to support the S-band and L-band

Achieved 800mW output with a pump laser 米兰ac体育 C-band Raman amplifiers