DFB Lasers

free beam:
760 nm
780 nm
795 nm
852 nm
935 nm
1064 nm
1083 nm

with fiber-pigtail:
760 nm
780 nm
785 nm
852 nm
1030 nm
1064 nm
1083 nm

A line graph with multiple peaks labeled “Fabry-Perot Laser,” representing the spectral output of a Fabry-Perot laser, in contrast to the narrow emission from single frequency laser diodes such as those offered by TOPTICA EAGLEYARD.

A sharp, narrow red peak on a graph, labeled “DFB LASER” below, representing the output spectrum of a distributed feedback laser—such as the single frequency laser diodes from TOPTICA EAGLEYARD.

Diagram showing four types of laser diode packages, including single frequency laser diodes TOPTICA EAGLEYARD, each emitting a red laser beam from its front face.

Laser Function

DFB Laser Architecture

When to use a DFB Laser

Applications

PLUG & PLAY

DFB Lasers as High-Precision Single-Frequency Laser Diodes

A DFB laser (Distributed Feedback laser) is a high-performance single-frequency semiconductor laser diode designed for applications requiring stable wavelengths, narrow linewidths, and high spectral purity. By integrating a Bragg grating directly into the waveguide, DFB lasers eliminate the need for external cavities and ensure reliable single-mode operation. TOPTICA EAGLEYARD offers a broad portfolio of DFB lasers at key wavelengths including 760 nm, 780 nm, 785 nm, 795 nm, 852 nm, 935 nm, 1030 nm, 1064 nm, and 1083 nm. Available in multiple output power levels and packaging options – from hermetically sealed butterfly modules to compact TO- packages, these lasers provide flexible solutions for a wide range of applications.

DFB PRODUCTFINDER

GET QUOTE

Stable Wavelength Control and High Spectral Performance

A conventional Fabry–Pérot diode emits light across multiple modes. A DFB laser solves this by etching a periodic grating directly into the semiconductor waveguide. This grating acts as a wavelength-selective filter: only the one wavelength matching the grating period is reinforced. The result is inherently single-frequency output.
Wavelength can be fine-tuned continuously via current and temperature over a controlled range. A TEC and thermistor provide the thermal stability needed for accurate wavelength control. An optical isolator is strongly recommended to prevent back-reflections.

DFB Laser

grating

The grating is a periodic corrugation etched directly into the waveguide. It acts as a distributed mirror: only one specific wavelength experiences constructive interference and is amplified, while all others are suppressed. This allows the DFB laser to emit at a precisely defined, highly stable wavelength — unlike lasers with simple end mirrors, which can lase on multiple modes at once.

Abstract geometric pattern with diagonal lines in blue, white, and red, inspired by the precision of single frequency laser diodes TOPTICA EAGLEYARD, featuring a zigzag blue section at the top left corner.

DFB Laser Linewidth in Comparison

A bell-shaped curve labeled "Intensity" vs. "Wavelength," illustrating the linewidth at the peak and broader spectrum above—ideal for showcasing single frequency laser diodes TOPTICA EAGLEYARD.

Graph showing a narrow peak representing a single frequency laser diode from TOPTICA EAGLEYARD’s DFB laser intensity versus wavelength, with dashed lines indicating the laser peak and linewidth.

TempErature

WHEN TO USE A DFB, A RWS OR A miniECL?

DFB lasers are used when stable single-frequency emission with a narrow linewidth and precise wavelength control is required, for example in spectroscopy, sensing, and telecommunications. TOPTICA EAGLEYARD has used both DFB and DBR technology for the production of single frequency lasers. In most cases, the DFB technology is preferred.

DFB lasers offer simpler control and lower system complexity because the feedback grating is integrated directly into the gain region, eliminating the need for multiple independently controlled sections. They provide highly stable single-mode operation with reduced mode hopping and excellent wavelength stability, making them well suited for high resolution spectroscopy and sensing applications.

DBR lasers offer similar performance but provide more flexibility for wavelength tuning due to the grating being located outside the active region, making them suitable for tunable applications. For cost-sensitive industrial applications such as interferometry, Ridge Waveguide Stabilized (RWS) lasers provide a small linewidth at significantly lower cost, while miniECL lasers are designed for highly demanding spectroscopic applications requiring ultra-narrow linewidths (~100 kHz) and maximum frequency stability. Learn more about the different laser types here.

LEARN MORE ABOUT OUR SINGLE FREQUENCY LASER DIODES

APPLICATIONS

Atomic Clock

Cold Atom Interferometry

Gas Detection (Oxygen)

Gas Detection

Inter- & Intra-Satellite Communication

Interferometry

LIDAR

Plug & Play as true game-changer

Experience Plug & Play as a true game-changer: our highly integrated fiber-coupled  DFB lasers (and miniECL), paired with the matching  miniTA, deliver superior performance while dramatically reducing setup complexity. Compared to traditional macroscopic systems, they save valuable time, offer unmatched stability, and let you get started instantly. Enjoy a fast, reliable solution anywhere with many available wavelengths options.