Development of an electro-absorption modulated laser with integrated semiconductor optical amplifier

- Realizing both low power consumption and high optical output power of 50 Gbaud, double the current output -

March 1, 2023

Developed the electro-absorption modulated laser (EML) “FOL13EBxCS” and began shipping samples in January
By integrating a semiconductor optical amplifier (SOA) into the EML, achieved high optical output power of 50 Gbaud, double the current output
By realizing both high optical output power and low power consumption, contributes to the establishment of optical communication networks that support the commercialization of 5G

Furukawa Electric Co., Ltd. (Head office: 2-2-3 Marunouchi, Chiyoda-ku, Tokyo; President: Keiichi Kobayashi) developed the high optical output power 50 Gbaud electro-absorption modulated laser (EML) “FOL13EBxCS” with integrated semiconductor optical amplifier (SOA) and began shipping samples in January.

Background

The installation of 5G networks for mobile phones has resulted in more cloud services that operate at faster speeds and larger data volumes, and following increased data traffic at the network edge, the demand for signal light sources for short and medium-range distances is increasing. EML has excellent signal waveform and high-speed operating characteristics, and it is broadly used as a laser source for medium-range distances (10km) at speeds of 100Gbps and higher. In addition to addressing longer network distances and larger data volumes, along with the growing needs for higher optical output power, it is also necessary to limit power consumption.

Details

By integrating a SOA into the EML, this new product realizes approximately double the optical output power at the same power consumption level compared to existing EML. With the existing EML, optical output power is increased by increasing current flow to the laser, and as a result, power consumption increases in proportion to the increase in optical output power. By integrating a SOA that can increase optical output with high efficiency, the newly developed EML realizes both higher optical output power and low power consumption.

Fig. 1 Power consumption – optical output power characteristics

Fig. 2 Existing EML

Fig. 3 EML with integrated SOA

When using this product as part of a 100G-400G Ethernet and next-generation high speed PON system, it should be possible to extend the distance of metro access networks.
In addition to laser sources for long haul and metro networks (for medium and long distances), we offer a lineup of laser sources for a broad range of optical networks, including data center and access networks (for short and medium distances, including this product).

**Main product specifications**
Parameter	Specification value	Units	Conditions
Operating temperature	55	℃
LD operating current	<80	ｍA
SOA operating current	<80	ｍA
EAM bias voltage	-1.5-0	V	50Gbps, NRZ
Extinction ratio	>4	dB	50Gbps, NRZ
Optical output power	>12	dBm	CW, EAM bias voltage = 0V
Wavelength	Support O-band and LAN-WDM

Provided structure: Chip on Submount

We will exhibit this new product at OFC 2023 scheduled to be held on March 7-9, 2023 in San Diego (at the OFS Fitel, LLC booth; Booth number 3229).

OFC 2023

Furukawa Electric Group’s efforts towards the SDGs

Based on the “Sustainable Development Goals (SDGs)” adopted by the United Nations, Furukawa Electric Group has formulated the “Furukawa Electric Group Vision 2030” which sets the year 2030 as its target and is advancing efforts with the aim to “Build a sustainable world and make people’s life safe, peaceful and rewarding, Furukawa Electric Group will create solutions for the new generation of global infrastructure combining information, energy and mobility.” Toward the achievement of our Vision 2030, we will take open, agile, and innovative approaches to promote ESG management that aims to increase corporate value over the medium to long term and will contribute to the achievement of the SDGs.

Furukawa Electric Group’s efforts towards the SDGs

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