What is a DFB Laser Diode?
A Distributed Feedback (DFB) laser diode incorporates an internal Bragg grating directly into the semiconductor chip. Unlike Fabry-Perot laser diodes, a DFB laser emits a stable single longitudinal mode, resulting in:
- Narrow linewidth
- Excellent wavelength stability
- High spectral purity
- High side-mode suppression ratio (SMSR)
- Low wavelength drift
- Stable continuous-wave (CW) operation
These characteristics make DFB lasers the preferred choice for applications requiring precise optical frequencies and stable single-frequency emission.
Key Features
- Available wavelengths: 1064 nm, 1310 nm, 1550 nm
- Optical output power up to 100 mW
- Narrow linewidth down to <30 kHz (depending on wavelength)
- Typical SMSR up to 45 dB
- Continuous-wave (CW) operation
- Integrated TEC, thermistor and monitor photodiode
- SM fiber or PM fiber options
- Optional integrated optical isolator
- FC/PC or FC/APC connectors
- Compact 14-pin butterfly package
- OEM customization available
Applications
Frankfurt Laser Company's DFB laser diodes are widely used in:
- Fiber optic communication
- Coherent optical communication
- DWDM systems
- Optical coherence tomography (OCT)
- Silicon photonics (SiPh)
- Fiber optic sensing
- Distributed sensing
- Optical metrology
- Precision interferometry
- Fiber laser seed sources
- Coherent LiDAR
- Quantum optics
- Scientific instrumentation
- Test and measurement systems
Available DFB Laser Wavelengths
1064 nm DFB Laser Diodes
Designed for precision metrology, interferometry and fiber laser seed applications requiring exceptional wavelength stability and narrow linewidth.
Typical applications:
- Fiber laser seeding
- Precision interferometers
- Optical metrology
- Coherent LiDAR
1310 nm DFB Laser Diodes
Optimized for silicon photonics, OCT systems and advanced sensing applications.
Typical applications:
- Silicon Photonics (SiPh)
- OCT imaging
- Fiber sensing
- Optical communications
1550 nm DFB Laser Diodes
Operating within the telecom C-band, these lasers are ideal for coherent communication and distributed fiber sensing where low fiber attenuation and spectral purity are essential.
Typical applications:
- Coherent communication
- DWDM
- Fiber optic sensing
- Laboratory instrumentation
Why Choose Frankfurt Laser Company?
Our DFB laser portfolio is designed for engineers who require reliable, narrow-linewidth laser sources with excellent long-term stability. Every module is engineered for seamless OEM integration while offering extensive customization in wavelength, optical power, fiber type and connector configuration.
Whether you need a standard telecom laser or a customized single-frequency source, Frankfurt Laser Company provides expert technical support from specification through production.
Frequently Asked Questions
What is the difference between a DFB laser and a Fabry-Perot laser?
DFB lasers emit a stable single longitudinal mode with a much narrower linewidth and significantly higher wavelength stability than Fabry-Perot lasers.
Can DFB lasers be customized?
Yes. All DFB laser families are available with either SM fiber or PM fiber.
Which wavelengths are available?
Frankfurt Laser Company currently offers DFB laser diodes from 760nm to 7970nm, please check our portfolio DFB-Lasers or send us a request Contact.
Related Products
- External Cavity Lasers (ECL)
- Butterfly Laser Diodes
- Fiber-Coupled Laser Modules
- Narrow Linewidth Laser Sources
- Single-Frequency Lasers
- Seed Lasers for Fiber Amplifiers
