DL pro

Tunable diode laser with digital control DLC pro

  • Tunable diode laser in patented pro design
  • Ultra-stable against temperatures & acoustics
  • With digital control DLC pro: Less drift & linewidth
  • Linewidth down to 10 kHz free running
  • Linewidth below 1 Hz possible with lock to external reference cavity

Our DL pro is the ultimate tunable diode laser. Its revolutionary mechanical design allows for both easy operation and extreme stability at the same time. It offers highest output powers, and optimized mode-hop-free tuning with a perfectly positioned virtual pivot point for the grating movement (Patents: DE 10 2007 028 499 and US 7970024). Together with the digital control DLC pro controller it shows unrivalled linewidth and drift – with the most comfortable and intuitive user interface. Also available with the economic SYST laser electronics. A software license may be purchased to enable frequency-locking features.

  • DL pro
  • DL pro
  • DLC DL pro

The DL pro HP diode laser features a special resonator design, which allows for higher single-mode output powers from "visible" laser diodes. Like the DL pro, it is an extended cavity diode laser (ECDL). Both lasers feature various modulation inputs and may be equipped with various options like fiber coupling, beam shaping etc. The lasers may also be driven by the economic SYS DC 110 laser control, however we highly recommend the DLC pro due the superior performance, especially for the DL pro HP lasers.

The DL pro is available with all laser diodes listed in our stocklist of AR-coated and Fabry-Perot laser diodes. An overview of the resulting wavelength coverage is shown in the Additional Information below.

We provide a number of TOPSellers representing direct solutions for typical applications such as laser cooling of atoms or ions. These systems combine a DLC pro and either a DL pro or DL pro HP including an appropriate isolator. They may be combined with fiber coupling and the software license.

DLC DL pro TOPSellers are available at these wavelengths:
850, 780, 670, 633 nm.

DLC DL pro HP TOPSellers are available at these wavelengths:
637, 461, 420, 399, 397, 369 nm.

See TOPSeller section below for details. For additional wavelengths, please refer to our laser diode stock lists: AR-coated and Fabry-Perot laser diodes.

  • Specification

      DLC DL pro DLC DL pro HP
    Wavelength coverage 369 .. 519 nm *, 628 .. 1770 nm * 369 .. 519 nm *, 633 .. 641 nm
    Typical power range 10 .. 300 mW 15 .. 110 mW after the isolator
    Typical coarse tuning range 2 .. 100 nm 2 .. 5 nm
    Typical mode-hop free tuning range ≥ 20 GHz
    Typical linewidth (5 µs integration time) 10 .. 300 kHz 150 .. 500 kHz

    Typical output beam characteristics 3 mm x 1 mm 2 mm x 1 mm
    Typical output beam polarization linear, > 100:1
    ASE background, typ. < -40 dB
    Optical isolation optional, see Options built-in, > 30 dB
    Fiber coupling efficiency**: min. (typ.) 55 (65) %
    Fiber coupling efficiency with Beam shaping pro **: min. (typ.) 65 (75) %
    Typical long term frequency change with room temperature  << 100 MHz / K
    Dimensions laser head (H x W x D) 90 x 90 x 240 / 300 mm³ *** 90 x 90 x 240 mm³
    Weight laser head 2.8 - 4.4 kg  2.8 - 3.5 kg
    Dimensions control unit (H x W x D) 154 x 450 x 348 mm³
    Weight control unit 8.0 kg
    Power supply 100 .. 240 V~, 50/60 Hz (wide range input) 
    Power consumption Typ. < 35 W, max. 250 W
    PC Interface (PC GUI included) Ethernet, USB, analog control
    Environmental temperature 15 - 30 °C (operating), 0 - 40 °C (storage and transport) 
    Environmental humidity Non condensing

    * Spectral coverage with gaps
    **With TOPTICA's FiberDock, efficiencies are possibly lower with strong ellipticity or short wavelengths
    ***The standard length is D=240 mm. If needed a housing of D=300 mm is automatically used.
    Please contact us for details.
    Specifications are subject to change without further notice.

  • Additional Top Seller

    DLC DL pro ...



    Typical Applications Cs cooling, Ca ion repump Rb cooling and repump, K cooling and repump Li cooling and repump NV center, Yb ion clear out laser HeNe laser wave-
    Sr cooling, Cs Rydberg,
    K Rydberg
    Ca cooling, Sr ion cooling, Rb Rydberg Yb cooling Ca ion cooling Yb ion cooling
    Peak power (mW) after the isolator, specified (typical) 70 (75)* 105 (130)** 25*** 45 (50) 40 110 70 110 65 13
    Wavelength (nm) 840 - 875 765 - 805 660 - 673 635 - 639 631 - 635 457 - 461 420 - 423 399 - 400.5 396.5 - 398.5 369.2 - 370.2

    Linewidth (kHz @5 µs delay) 100 50 600 500 200 150 150 150 150 150
    Included optical isolator > 60 dB > 60 dB > 60 dB > 35 dB > 60 dB > 35 dB > 35 dB > 35 dB > 35 dB > 28 dB
    Polarisation linear, PER 100:1
    Polarisation axis vertical horizontal vertical diagonal vertical diagonal
    Fiber coupling efficiency with FiberDock (optional), specified (typical) 55% (65%)
    replacement of laser diode by customer in factory by customer in factory
    Ships from stock yes yes no no no no no no no no
    More power with DLC TA pro or BoosTA available yes yes yes no no no no no no no
    (Even) more power with DLC TA-SHG pro available no no yes yes yes yes yes yes yes yes


    *Detailed power specification after the isolator:
    840 - 842 nm: > 50 mW, 842 - 850 nm: > 65 mW, 850 - 875 nm: > 70 mW, 875 - 877 nm: > 65 mW

    **Detailed power specification after the isolator:
    765 - 771 nm: > 40 mW, 771 - 780 nm: > 60 mW, 780 - 795 nm: > 75 mW, 795 - 800 nm: > 105 mW, 800 - 805 nm: > 75 mW

    ***Detailed power specification after the isolator:
    660 - 666 nm: > 15 mW, 666 - 670 nm: > 25 mW, 670 - 673 nm: > 15 mW

  • Additional Information
  • Options

    Narrow linewidth
    With this option DL pro laser systems are optimized for narrow linewidths. It is also suited for seed lasers of TA or NLO systems as well as lasers of Laser Rack Systems but not for DL pro HP lasers.
    Fiber Coupling

    TOPTICA’s patented fiber coupler provides highest single-mode fiber-coupling efficiencies, easy alignment and at the same time highest stability. Fiber coupling efficiency of > 55% is specified for all DL pro, beam shaping optics are included if needed. 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.
    Optical Isolation
    Isolators are used to protect the laser diode against back reflections. This not only prevents damage to the diode but also ensures untroubled tuning and single-frequency operation. Fiber-coupling with angle-polished fibers (both ends) requires at least a single-stage isolator (> 30 dB). 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 (> 60 dB).
    Beam Shaping
    To shape elliptical laser beams into round profiles, either an anamorphic prism pair (APP) or cylindrical lenses are used. The compression ratio is set at the factory.
    The motorization of the coarse tuning offers manual control and operation via software interface. This option is available for most DL pro laser systems (most AR laser diodes and some FP diodes) including DL pro HP laser systems. See Downloads section below.
    The DL pro (HP) has two modulation inputs that allow current modulation frequencies of up to 150 MHz. A Bias-T allows even higher current modulation frequencies of up to several GHz, depending on the diode. It is also suited for seed lasers of TA or NLO systems.
    Electronics Modules A broad variety of electronic locking modules is available for frequency stabilization.
  • Applications
  • Downloads


    • For software updates and Python support of the digital laser controller please see the Downloads section on the DLC pro page.
    • Mot / DL pro Software Version 1.15b: Free download of the latest MOT / DL pro software for DL pro equipped with the motorization option. The software consists of sample VIs for computerized motor control. Some VIs have been compiled to run without a LabView installation. The software is provided "as is" as an example for integrating the motor in an experiment or setup.

    Technical information

  • Literature

  • Related Products