Frankfurt Laser Company Launches Revolutionary Visible DFB Laser Diodes for Precision Applications
Frankfurt Laser Company (FLC) proudly announces the release of a groundbreaking series of Visible Distributed Feedback (DFB) Laser Diodes, covering key wavelengths in the visible spectrum: 405 nm, 450 nm, 488 nm, and 515 nm. Designed for cutting-edge scientific, industrial, and medical applications, these lasers deliver exceptional wavelength stability, narrow linewidth, and superior beam quality — setting new performance standards for visible DFB technology.
The new FESL Visible DFB series extends FLC’s leadership in precision semiconductor lasers, offering single longitudinal mode operation with linewidths as low as 1–2 MHz and outstanding polarization extinction ratios (>20 dB). Packaged in compact TO-56 housings, these diodes provide consistent performance for demanding environments, including biomedical instrumentation, spectroscopy, interferometry, holography, quantum optics, and fluorescence excitation.
“With the introduction of these visible DFB lasers, we’re bridging the gap between stability and spectral purity in the visible range,” says Dr. Steffen Driever, Sales & Product Manager at Frankfurt Laser Company. “Researchers and engineers can now rely on compact, energy-efficient sources that rival much larger external cavity designs.”
Overview of the New Visible DFB Series
| Model |
Center Wavelength (nm) |
Output Power (mW) |
Linewidth (MHz) |
Slope Efficiency (W/A) |
Forward Voltage (V) |
Thermal Tuning (pm/K) |
Current Tuning (pm/mA) |
PER (dB) |
Package |
| FESL-405-30-DFB-TO56 |
405 |
30 |
2 |
0.7–1.6 |
4.5–5.5 |
15 |
4 |
>20 |
TO-56 |
| FESL-450-50-DFB-TO56 |
450 |
50 |
2 |
1.0–1.7 |
4.5–5.5 |
15 |
4 |
>20 |
TO-56 |
| FESL-488-60-DFB-TO56 |
488 |
60 |
2 |
0.6–1.5 |
5.5–6.5 |
15 |
4 |
>20 |
TO-56 |
| FESL-515-25-DFB-TO56 |
515 |
25 |
1 |
0.2–0.6 |
6.5–7.0 |
15 |
4 |
>20 |
TO-56 |
Detailed Specifications
FESL-405-30-DFB-TO56 — Violet DFB Laser
-
Wavelength: 403–407 nm (typ. 405 nm)
-
Output Power: 30 mW
-
Threshold Current: 40–60 mA
-
Forward Current (max): 70 mA
-
Forward Voltage: 4.5–5.5 V
-
Linewidth: 2 MHz
-
Slope Efficiency: 0.7–1.6 W/A
-
Beam Divergence (FWHM): 9° (slow axis) / 32° (fast axis)
-
Thermal Tuning: 15 pm/K
-
Current Tuning: 4 pm/mA
FESL-450-50-DFB-TO56 — Blue DFB Laser
-
Wavelength: 443–457 nm (typ. 450 nm)
-
Output Power: 50 mW
-
Threshold Current: 35–50 mA
-
Forward Current (max): 70 mA
-
Forward Voltage: 4.5–5.5 V
-
Linewidth: 2 MHz
-
Slope Efficiency: 1.0–1.7 W/A
-
Beam Divergence (FWHM): 9° (slow) / 30° (fast)
-
Thermal Tuning: 15 pm/K
-
Current Tuning: 4 pm/mA
FESL-488-60-DFB-TO56 — Cyan DFB Laser
-
Wavelength: 487–489 nm (typ. 488 nm)
-
Output Power: 60 mW
-
Threshold Current: 45–60 mA
-
Forward Current (max): 120 mA
-
Forward Voltage: 5.5–6.5 V
-
Linewidth: 2 MHz
-
Slope Efficiency: 0.6–1.5 W/A
-
Beam Divergence (FWHM): 9° (slow) / 26° (fast)
-
Thermal Tuning: 15 pm/K
-
Current Tuning: 4 pm/mA
FESL-515-25-DFB-TO56 — Green DFB Laser
-
Wavelength: 510–520 nm (typ. 515 nm)
-
Output Power: 25 mW
-
Threshold Current: 90–120 mA
-
Forward Current (max): 200 mA
-
Forward Voltage: 6.5–7 V
-
Linewidth: 1 MHz
-
Slope Efficiency: 0.2–0.6 W/A
-
Beam Divergence (FWHM): 10° (slow) / 26° (fast)
-
Thermal Tuning: 15 pm/K
-
Current Tuning: 4 pm/mA
About Frankfurt Laser Company
Frankfurt Laser Company (FLC) is a leading supplier of semiconductor laser diodes, laser modules, and photonic components. Since its founding in 1994, FLC has built a reputation for innovation and quality in laser technology for industrial, medical, defense, and research applications. The company continues to expand its product portfolio, offering tailored solutions for OEM and scientific customers worldwide.
Contact FLC for more information:
Email: sales@frlaserco.com
