Explore SemiNex’s latest Wavelength Swept ECL Modules and Butterflies
Danvers, MA – September 2025: SemiNex announces the release of its new High-Power External Cavity Laser (ECL) product line, featuring both fixed-wavelength butterfly modules and wavelength-swept ECL systems. These products deliver industry-leading output power and coherence in compact, integration-ready formats for advanced photonic applications.
By Seminex

SemiNex has expanded its portfolio of precision laser sources with the launch of its high-power ECLs. Engineered for both fixed-wavelength and wavelength-swept operation, this product line addresses growing demand in optical networks, FMCW LiDAR, quantum sensing, aerospace, and industrial metrology.
The butterfly-packaged ECLs deliver >200 mW fiber-coupled power with <3 kHz narrow Lorentzian linewidth, providing unmatched stability and accuracy. The wavelength-swept ECL modules combine high output power with user-defined sweep ranges and mode-hop-free operation, creating turnkey solutions for OCT, OFDR, and FMCW LiDAR.
ECL Performance & Specifications
Key features for these high-power, narrow linewidth ECL packages include:
Butterfly-Packaged High-Power Narrow Linewidth ECL
- >200 mW fiber-coupled power
- <3 kHz Lorentzian linewidth for ultra-stable coherence
- Low RIN and excellent SMSR for noise-sensitive applications
- C- or O-band operation, with custom center wavelengths available
- Packaged in a standard 14-pin butterfly fiber module for easy integration
Wavelength-Swept ECL Modules
- Available in two sweep configurations:
- ECL-310-S1: 1550 nm with 10 GHz (0.8 nm) sweep range
- ECL-310-S3: 1550 nm with 600 GHz (4.8 nm) sweep range
- >200 mW output power with narrow linewidth stability
- Mode-hop-free, linear sweeping for high-resolution imaging and sensing
- Complete turnkey system with built-in driver and controller
Key Advantages
-
- Industry-leading power + coherence: Fixed-wavelength ECL achieves >200 mW with <3 kHz linewidth
- Turnkey wavelength-swept solutions: Integrated driver and controller for plug-and-play operation
- Wavelength flexibility: C- and O-band coverage, with custom center wavelengths available
- Compact, integration-ready packaging: Standard 14-pin butterfly or full module systems
View more information regarding these products in our catalog below.
By Seminex
Related articles
Featured
Latest Product Releases from SemiNex!
SemiNex Product Launches
Featured
SemiNex Invites You to Laser World of Photonics Munich 2025
Join SemiNex at LWOP Munich 2025