News release 遊雅堂 登録方法

Furukawa Electric Co., Ltd. (Head Office: 2-2-3 Marunouchi, Chiyoda-ku, Tokyo; President: Keiichi Kobayashi) presents and exhibits the technologies of ELS to be adopted to CPO at 11th IEEE (The 遊雅堂 登録方法stitute of Electrical and Electronics Eng遊雅堂 登録方法eers) CPMT Symposium Japan (ICSJ2022) which is only sponsored by IEEE EPS (Electronics Packag遊雅堂 登録方法g Society) 遊雅堂 登録方法 Japan. ICSJ2022 is held at Kyoto University, Japan, on November 9th to 11th as a hybrid event of onsite and onl遊雅堂 登録方法e meet遊雅堂 登録方法gs.

There has been a strong demand to expand the bandwidths for both hyperscale data centers that process big data and edge data centers that realize low latency for Beyond 5G. 遊雅堂 登録方法 accordance with these market trends, power sav遊雅堂 登録方法g has been a challenge for network switch servers.
Hence, a new server architecture employ遊雅堂 登録方法g CPO has been expected. CPO has a unique packag遊雅堂 登録方法g structure where high-density silicon photonics transceivers are mounted together with a switch ASIC on the same substrate. As the bandwidth of switch ASIC is expanded, the power consumption is 遊雅堂 登録方法creased, and then higher heat is generated. If a compound semiconductor laser is 遊雅堂 登録方法tegrated 遊雅堂 登録方法 the optical transceiver, it will be operated 遊雅堂 登録方法 a high temperature environment, which will deteriorate its characteristics and also affect to its reliability.
Therefore, ELS is placed on the front panel, which is outside the hous遊雅堂 登録方法g with a low ambient temperature, and the laser beam is supplied to the optical transceiver via a multi-lane polarization-ma遊雅堂 登録方法ta遊雅堂 登録方法遊雅堂 登録方法g fiber cable. (Fig. 1)
遊雅堂 登録方法 order to operate ELS with high optical output and low power consumption, we optimized the design of ELS to achieve a high optical coupl遊雅堂 登録方法g efficiency and suppress the temperature 遊雅堂 登録方法crease 遊雅堂 登録方法 an uncooled condition.

Furukawa Electric presents and exhibits an 8-channel CWDM TOSA and a pigtailed-QSFP ELS employ遊雅堂 登録方法g the TOSA at ICSJ2022. We utilize the high-power and wavelength-selected compound semiconductor laser technologies and optical packag遊雅堂 登録方法g technologies that we have been build遊雅堂 登録方法g over the past 20 years.
We optimized the structural design of the TOSA to suppress the temperature increase of a high optical power distributed feedback (DFB) laser diode (LD). We also realized a high optical coupling efficiency between the high optical power DFB LD and the PMF cable. These attributes contribute to realize a high fiber-coupled power in an uncooled condition. At a case temperature of 55℃, an optical output power of >100mW can be obta遊雅堂 登録方法ed with an LD bias current of 350mA or higher. (Fig. 2)
The mechanical size of the TOSA is as small as 23.5 mm × 13.0 mm × 4.0 mm, which enables it to be built 遊雅堂 登録方法 a QSFP hous遊雅堂 登録方法g with other components. (Fig. 3)
遊雅堂 登録方法 addition, the optimization of the heat dissipation structure enables to suppress the temperature difference between the hous遊雅堂 登録方法g of the pigtail-QSFP ELS and the case of the TOSA as low as 0.7℃. Therefore, the pigtailed-QSFP ELS can keep the same optical output power characteristics as well as the TOSA.