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.

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Toptica Product Focus: Continuously Tunable Lasers

TOPTICA Tuesday 20170530 400x650 CTL

Wide mode-hop-free tuning is important for many exciting applications: for example resonant excitation of small structures like quantum dots and micro-cavities as well as molecular spectroscopy or components testing. TOPTICA is specialized in tunable diode lasers with excellent precision, reliability and ease-of-use.

For example, TOPTICA’s CTL – continuously tunable laser – enables mode-hop-free tuning of up to 110 nm at several central wavelengths. Wide scans can be performed with highest resolution and narrow linewidth, and CTL features high absolute and relative wavelength accuracy as well as high power.

In combination with its fully digital controller DLC pro, the CTL laser is easy to use and operate via touch-screen and knobs as well as via remote PC GUI and command language. The low noise and drift levels of the controller make the CTL series even more stable and lowest-noise.

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Toptica DL Pro: Tunable Diode Laser


  • Tunable diode laser in pro design ECDL setup
  • Available with four exceptional AR diodes around 780 nm, 850 nm, 940 nm, and 1040 nm
  • Output powers up to 100 mW
  • Ultra stable, typical linewidth 100 kHz (5 µs)
  • Very low drift with room temperature changes (typ. << 100 MHz/K)
  • Insensitive to acoustics and vibrations
  • Easy coarse tuning up to 100 nm
  • Mode-hop free  tuning up to 50 GHz (optimized virtual pivot point)
  • Beam angle compensation mirror included
  • Fast AC and DC current modulation included

The DL pro is the ultimate tunable diode laser. Its revolutionary mechanical design allows both easy operation and extreme stability at the same time. The underlying Littrow geometry allows for highest output powers, and optimum mode-hop free tuning is realized with a perfectly positioned virtual pivot point for the grating movement.

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Toptica BoosTA Semiconductor Laser Amplifier

BoosTA 01

  • Compact and economic optical amplifier
  • Ideally suited to amplify TOPTICAs diode lasers,
    also suited for third party products
  • Wavelength range 649 .. 1083 nm
  • High power, up to 1.5 W
  • Nearly diffraction limited output beam with suitable master oscillator
    (M² typ. < 1.5, fiber coupling efficiency typ. 60 %)
  • Integrated driver concept, most compact
  • Computer controlled (RS 232)
The BoosTA is a compact and economical optical amplifier. Just put light into it, and it amplifies it up to a factor 100. The spectral properties of the master laser are preserved. The BoosTA includes computer controlled integrated electronics, and all optics for accepting a collimated and linearly polarized input beam. Custom optics and good thermal management guarantee best performance.

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Toptica SHG pro Stand-Alone Second Harmonic Generator Module

SHG pro 02

  • Frequency doubling of Ti:Sapphire, dye, gas, fiber and diode lasers
  • Compact, stand-alone bow-tie cavity
  • pro technology for highest mechanical and thermal stability
  • Highest cw conversion rates
  • Near TEM00 beam profile
  • Mode matching and beam shaping optics integrated
  • Optional fiber coupling of input and/or output beam

The SHG pro is the device of choice if existing lasers are to be frequency doubled. Designed in TOPTICA’s pro technology, it unites highly stable performance and convenient operation. Mirror and crystal holders can be adjusted without opening the resonator cover. A wide range of non-linear crystals covers SHG wavelengths from 205 to 800 nm.  TOPTICA offers competent support for adapting the unit to customer requirements.

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Toptica TA / FA SHG pro Frequency Doubled, High Power Tunable Diode Laser

 TA SHG pro 02
  • UV, blue, green, yellow wavelengths: 320 .. 590 nm
  • High power: Up to 2 W
  • Single-frequency operation, linewidth < 500 kHz (typ.)
  • Seed: Tunable, grating stabilized diode laser
  • Amplifier: Semiconductor or fiber amplifier
  • SHG: Resonant frequency doubling stage
  • Probe beam output of fundamental laser
  • Mode matching and beam shaping optics integrated
  • Increased amplitude stability with "noise eater" option
The TA / FA SHG pro system comprises a tunable, grating-stabilized diode laser, a high power semiconductor (TA) or fiber (FA) amplifier, and an integrated frequency doubling stage (SHG pro). The SHG stage is a folded ring cavity in bow-tie configuration with excellent thermal and mechanical stability. The system provides tunable laser radiation for spectroscopy, laser cooling, optical data storage, holography and interferometry.

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Toptica DL pro HP: Powerful, tunable, single-frequency laser


  • Up to 100 mW single-frequency, tunable output
  • Standard wavelengths 405, 425, and 633 nm
  • Other wavelengths 370 .. 640 nm on request
  • Extremely stable, low drift
  • Linewidth < 2 MHz

The DL pro HP diode laser features a special resonator design, which allows for higher single-mode output powers from "visible" laser diodes. Manual coarse tuning of the wavelength is possible across the gain spectrum of the diode (for blue diodes approx.  2-3 nm) and mode-hop free fine tuning up to 50 GHz. Standard models are available at 405, 425 nm, and 633 nm; other wavelengths between 370 and 640 nm can be provided on request. The laser features various modulation inputs and includes an isolator. Fiber coupled versions are optionally available.

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