DL 100 – Tunable Diode Laser

DL 100 – Tunable Diode Laser

  • Economic, tunable cw diode laser
  • Widest wavelength selection: 370 nm .. 1770 nm
  • Output powers up to 300 mW
  • Modular design with hands-on set-up

TOPTICA’s DL 100 is a well-established and economic laser source for spectroscopy and many other scientific applications. It is an open system that can be changed and maintained by the experienced user. The DL 100’s specifications depend strongly on the implemented laser diode and are given in TOPTICA’s laser diode stock lists.



Wavelength coverage and availability of TOPTICA’s DL 100.


DL 100
Center wavelengths370 .. 517 nm*
632 .. 1770 nm*
Typical power range3 .. 300 mW
Typical coarse tuning range2 .. 100 nm
Typical mode-hop free tuning range20 GHz
Typical linewidth (5 µs integration time)100 kHz .. 1 MHz
Typical output beam characteristics3 mm x 1 mm
Typical output beam polarizationLinear > 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 temperature400 MHz / K

*Spectral coverage with gaps
**With TOPTICA's FiberDock, efficiencies are possibly lower with strong ellipticity or short wavelengths
Specifications are subject to change without further notice.
TOPTICA Photonics AG, www.toptica.com

Options & Related Products

Options & Related Products


DL-ModThe PCB includes a FET and a Bias-T.
The FET is DC coupled with an electrical bandwidth (-3 dB) of 20 MHz.
The Bias-T is AC-coupled with an electrical bandwidth of > 300 MHz.
The optical modulation bandwidths are generally lower and depend on the properties of the diode.

Optical Isolation
single stage

Isolators are used to protect the laser diode from back reflections. This not only prevents damage to the diode but also ensures untroubled single-mode operation and tuning. Fiber coupling with angle polished fibers (both ends) requires at least a single stage isolator.

Optical Isolation
double stage

Double stage isolators are needed if reflections from the experiment into the laser are expected. Fiber coupling with non-angle polished fibers also requires a double stage isolator.


The compact prism pair is used for beam compression only. The compressed circular beam is small enough for using inexpensive small aperture isolators, and the fiber coupling efficiency is enhanced by approximately 10 %. The compression ratio is set at the factory.
The variable APP J is available for beam compression and expansion.


TOPTICA's patented fiber coupler provides highest single-mode fiber coupling efficiencies, easy alignment and at the same time highest stability. TOPTICA additionally offers a wide range of single-mode and polarization maintaining fibers, including fiber-optic beam splitters. Optical isolation is mandatory for fiber coupled diode laser systems.
Electronics ModulesA large range of control, stabilization and frequency locking modules are available.


Standard Configurations:

ConfigurationConsists ofAvailable wavelengths

Configuration I

  • Laser head, electronics
+ Modulation PCB DL-Mod
Given by available laser diodes
(see www.laser-diodes.com)

Configuration II

  • Laser head, electronics
  • Isolator 30 dB
+ Modulation PCB DL-Mod
+ FiberDock (optional)   
630 .. 935, 1260 .. 1395,
1490 .. 1610 nm

Configuration III

  • Laser head, electronics
  • APP compact, compressing
  • Isolator 30 dB
+ Modulation PCB DL-Mod
+ FiberDock (optional)
390 .. 420, 630 .. 1180,
1260 .. 1395, 1490 .. 1600 nm

Configuration IV

  • Laser head, electronics
  • Isolator 60 dB
+ Modulation PCB DL-Mod
+ FiberDock (optional)
650 .. 900, 1060 .. 1090,
1285 .. 1335, 1515 .. 1585 nm


Related Products:

  • DL pro: pro series ECDL with one of four exceptional AR coated laser diodes
  • DL 100 / pro design: pro design ECDL at any DL 100 wavelength
  • DL DFB: Diode laser with wide mode-hop free tuning and slightly broader linewidth
  • TA pro: pro series ECDL with tapered amplifier (649 .. 1083 nm available)
  • BoosTA: Semiconductor amplifier for higher powers (649 .. 1083 nm available)
  • Frequency converted diode lasers for all other wavelengths
  • AR, FP, and DFB Laser Diodes
  • Numerous Photonicals, tools and helpful equipment for working with lasers, for example Fabry-Perot Interferometers, Wavelength Meters, …


Technical Information

Technical Information

Dimensions laser head 79.4 x 80 x 228 mm³
Weight laser head 2.3 kg
Dimensions control unit (H xW x D) 150 x 465 x 385 mm³
Weight control unit 11 kg
Power supply 100 .. 120 V / 220 .. 240 V AC, 50 .. 60 Hz (auto detect)
Power consumption < 100 W
PC Interface Analog control
Environment temperature  15 - 30 °C
0 - 40 °C
Environment humidity Non condensing


Technical Drawings





Brochure: Scientific Lasers (PDF, 8.1 MB)
Brochure: Scientific Lasers (PDF, 8.1 MB)
Brochure: Specifications & Configurations Tunable Diode Lasers (PDF, 0.8 MB)
Brochure: Specifications & Configurations Tunable Diode Lasers (PDF, 0.8 MB)
Video: DL Application Video (WMV, 6.3 MB)