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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.

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

  • Specifications
    DLC DL pro DLC DL pro HP
    Wavelength coverage 369 .. 519 nm *, 628 .. 1770 nm *393 .. 519 nm *, 633 .. 641 nm
    Typical power range 10 .. 300 mW15 .. 110 mW behind isolator
    Typical coarse tuning range 2 .. 100 nm2 .. 5 nm
    Typical mode-hop free tuning range ≥ 20 GHz
    Typical linewidth (5 µs integration time) 10 .. 300 kHz150 .. 500 kHz
    Typical output beam characteristics3 mm x 1 mm2 mm x 1 mm
    Typical output beam polarizationlinear, > 100:1
    ASE background, typ.< -40 dB
    Optical isolationoptional, see Optionsbuilt-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 head2.8 - 4.4 kg 2.8 - 3.5 kg
    Dimensions control unit (H x W x D)154 x 450 x 348 mm³
    Weight control unit8.0 kg
    Power supply100 .. 240 V~, 50/60 Hz (wide range input) 
    Power consumptionTyp. < 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 humidityNon 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.

  • TOPSeller
    DLC DL pro ...




    Typical ApplicationsCs cooling, Ca ion repumpRb cooling and repump, K cooling and repumpLi cooling and repump, Sr ion clock transitionNV center, Yb ion clear out laserHeNe laser wave-
    Sr cooling, Cs Rydberg,
    K Rydberg
    Ca cooling, Sr ion cooling, Rb RydbergYb coolingCa ion coolingYb ion cooling
    Peak power (mW) behind isolator, specified (typical)70 (75)*105 (130)**2545 (50)4011070506513
    Wavelength (nm)840 - 875765 - 805664 - 674635 - 639631 - 635457 - 461420 - 423399 - 402396.5 - 398.5369.2 - 370.2
    Linewidth (kHz @5 µs delay)100100200500200150150150150100
    Included optical isolator> 60 dB> 60 dB> 60 dB> 35 dB> 60 dB> 35 dB> 35 dB> 35 dB> 35 dB> 28 dB
    Polarisationlinear, vertical, PER 100:1
    Fiber coupling efficiency with FiberDock (optional), specified (typical)55% (65%)
    replacement of laser diodeby customerin factoryby customerin factoryby customer
    Ships from stockyesyesnononononononono
    More power with DLC TA pro or BoosTA availableyesyesyesnonononononono
    (Even) more power with DLC TA-SHG pro availablenonoyesyesyesyesyesyesyesyes


    *Detailed power specification behind isolator:
    840 - 842 nm > 60 mW, 842 - 850 nm: > 65 mW, 850 - 875 nm: > 70 mW, 875 - 877 nm: > 65 mW

    **Detailed power specification behind isolator:
    765 - 771 nm: > 45 mW, 771 - 780 nm: > 60 mW, 780 - 795 nm: > 75 mW, 795 - 800 nm: > 105 mW, 800 - 805 nm: > 75 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 but not for DL pro HP lasers.

    Fiber Coupling (FiberDock)

    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.

    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 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 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.

    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 ModulesA broad variety of electronic locking modules is available for frequency stabilization.
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