Toptica DL DFB: Tunable Distributed Feed-back Lasers

DFB pro 03

  • Single-frequency laser with distributed feedback diode
  • Any wavelength between 760 nm .. 2880 nm available
  • Output power up to 150 mW
  • Largest mode-hop free tuning range: Up to 1400 GHz (4 nm)
  • Linewidth typ. 0.5 .. 4 MHz, coherence length 25 .. 200 m
  • Reliable operation even in harsh environments
  • Options: High-frequency modulation, optical isolation, fiber output

Distributed feedback (DFB) lasers offer wide frequency tuning and high output power in a compact, rugged setup. The frequency selective element – a Bragg grating – is integrated into the active section of the semiconductor and ensures single-frequency operation without any bulk optics. A wide variety of DFB diodes is available from stock; custom wavelengths can be provided even in low quantities.

Technical Information

Center wavelengths640 .. 685 nm*
760 .. 2880 nm*
Typical power range 2 .. 150 mW
Typical coarse tuning range 2 .. 6 nm
Thermal tuning:
Typical range
Typical speed
Typical rate

> 1000 GHz
50 GHz / sec
- 25 GHz/K
Electric tuning:
Typical range
Modulation bandwidth
Typical rate

50 GHz
10 kHz**
1 .. 10 GHz/mA
Typical linewidth (5 µs integration time) 500 kHz .. 4 MHz
Typical output beam characteristics 3 mm x 1 mm
Typical output beam polarization Linear > 100:1
Fiber coupling efficiency***: min. (typ.) 55 (65) %
Fiber coupling efficiency with APP***: min. (typ.) 65 (75) %
Typical long term frequency change with room temperature < 100 MHz/K
Thermal stabilization ColdPack or TO-3 package
Environmental temperature (operating) 15 - 30 °C
Environmental temperature (transport) 0 - 40 °C
Humidity Non condensing
Operating voltage

100 .. 120 V / 220 .. 240 V AC
50 .. 60 Hz (auto detect)
Power consumption Typ. < 100 W, max. 300 W

 *Spectral coverage with gaps
**With SYS DC 110. Higher bandwidth feasible with HF modulation PCB
**With TOPTICA's FiberDockSpecifications are subject to change without further notice TOPTICA Photonics AG, www.toptica.com

For more information, please click here .

You are here: Home Lasers & Sources Laser Diodes External Cavity Toptica DL DFB: Tunable Distributed Feed-back Lasers