Casela Technologies debuts CW DFB lasers for silicon photonics-based optical transceivers

March 23, 2023
The lasers exhibit record-high power conversion efficiency and optical power, the company asserts.

Casela Technologies, founded in 2019 and with operations in Nanjing, Taipei, and Silicon Valley, launched a line of 1310-nm high-power, continuous-wave (CW) distributed feedback (DFB) lasers at OFC 2023. The lasers exhibit record-high power conversion efficiency and optical power, the company asserts.

The 1- and 2-mm-long DFB lasers deliver 125 mW to 200 mW of optical power when uncooled and 300 to 400 mW, respectively, when cooled. Casela says the lasers offer power conversion efficiencies of 30% when cooled and 20% when uncooled operating at the maximum rated power. Other features include:

  • large modes with near-circular profiles that improve coupling efficiency to fibers or silicon-based waveguides
  • reliable operation proven during accelerated life testing.

Casela believes the lasers will find use in silicon photonics based optical transceivers, particularly DR4 and DR8 transceivers. The lasers were described in a technical paper delivered as part of the OFC 2023 conference program. The company also is offering lasers with the same efficiency and power performance at other WDM, LAN-WDM, and CWDM4 wavelengths.

“Casela was founded by industry veterans to focus on an innovative path to higher laser powers and efficiency demanded by new requirements in data centers and system-on-chip [SOC] applications,” commented Dr. Bo Lu, CEO of Casela Technologies. “With the demonstration and publication of our industry-leading laser results at OFC 2023, we are announcing our new laser platform and products for transceiver and co-packaged optics applications. We are also pleased that Casela’s high-output laser performance has been validated by multiple customers and will be available in high-volume production in 2H2023.”

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About the Author

Stephen Hardy | Editorial Director and Associate Publisher, Lightwave

Stephen Hardy is editorial director and associate publisher of Lightwave and Broadband Technology Report, part of the Lighting & Technology Group at Endeavor Business Media. Stephen is responsible for establishing and executing editorial strategy across the both brands’ websites, email newsletters, events, and other information products. He has covered the fiber-optics space for more than 20 years, and communications and technology for more than 35 years. During his tenure, Lightwave has received awards from Folio: and the American Society of Business Press Editors (ASBPE) for editorial excellence. Prior to joining Lightwave in 1997, Stephen worked for Telecommunications magazine and the Journal of Electronic Defense.

Stephen has moderated panels at numerous events, including the Optica Executive Forum, ECOC, and SCTE Cable-Tec Expo. He also is program director for the Lightwave Innovation Reviews and the Diamond Technology Reviews.

He has written numerous articles in all aspects of optical communications and fiber-optic networks, including fiber to the home (FTTH), PON, optical components, DWDM, fiber cables, packet optical transport, optical transceivers, lasers, fiber optic testing, and more.

You can connect with Stephen on LinkedIn as well as Twitter.

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