TOPTICA Photonics AG - A passion for precision - www.toptica.com

TopMode

Powerful and Coherent Diode Lasers

  • Diode laser with best wavelength / coherence stability
  • Wavelengths: 405 / 445 / 488 / 515 / 633 nm
  • 100 mW single-frequency power @ 405 nm
  • Includes active coherence stabilization (CHARM)
  • For metrology, interferometry, Raman spectroscopy

TOPTICA’s TopMode lasers operate as easily as a HeNe, but also offer higher power and blue wavelengths. The TopMode series sets records in terms of power, coherence and wavelength stability. The proprietary CoHerence-Advanced Regulation Method (CHARM) provides an active stabilization of the lasers’ coherence and ensures continuous single-frequency operation. TopMode and CHARM means nothing less than reliable 24/7 operation.

  • Specifications
    Model TopMode 405 TopMode 445 TopMode 488 TopMode 515 TopMode 633
    Operation cw, single (fixed) frequency
    Wavelength 405 nm 443 nm 488 nm 514 nm 633 nm
    Wavelength tolerance ± 2 nm
    Wavelength selection upon request, accuracy +/- 0.25 nm
    Wavelength tuning No
    Wavelength stability* < 1 pm/h (< 0.5 pm/h typ.), peak-peak
    Linewidth < 5 MHz (< 0.01 pm)
    Coherence length > 25 m
    ASE suppression 40 dB typ. 35 dB typ.
    Output power, free-space 50 mW
    (100 mW**)
    30 mW 30 mW
    (60 mW**)
    25 mW 50 mW
    Output power, fiber-coupled 25 mW
    (50 mW**)
    15 mW 15 mW
    (30 mW**)
    15 mW 25 mW
    CHARM Active coherence stabilization, included
    Power stability * Typ. < 0.5% (STD/mean) / h
    Intensity noise (RMS) ≤ 0.1% @ 10 Hz - 10 MHz
    Polarization Linear, > 100 : 1, 90° (free-space version)
    Beam shape Collimated, circular, typ. diameter ∅ 1 mm (FWHM), ellipticity < 10% ***
    Spatial mode M² < 1.5 (< 1.2 typ.)
    Optical isolation Built-in, > 30 dB
    Fiber coupling Optional, typ. 60% in SM fiber
    Electronics TopMode CHARM Control
    Warm-up time < 10 min from standby
    Dimensions laser head (H x W x D) Free-beam: 192 x 80 x 60 mm, fiber-coupled: 218 x 80 x 60 mm
    Weight laser head 1.5 kg
    Dimensions control unit (H x W x D) 45 mm x 480 mm x 290 mm
    Weight control unit 4 kg
    Power supply 100 .. 120 V / 220 .. 240 V AC, 50 .. 60 Hz (auto detect)
    Power consumption typ. < 70 W, max. 150 W (incl. CHARM control)
    PC Interface Ethernet, USB
    Environment temperature 15 - 30 °C, stability ± 3 °C (operating), 0 - 40 °C (storage and transport)
    Environment humidity Non-condensing

    * With CHARM activated
    ** Optional high-power version
    *** In the far field, i.e. 2 m behind source. Note that the 488 nm laser has an elliptical beam profile.

  • Additional Information
  • Options

    Fiber coupling - SmartDock
    Turns the TopMode into a rugged fiber coupled diode laser system. Both single-mode and polarization-maintaining fibers can be connected to the SmartDock. Better than 60 % coupling efficiency is guaranteed, 75% are typical values, but efficiencies up to 90 % have been demonstrated.

    • Highest single-mode coupling efficiency
    • Exceptional stability, even under varying ambient conditions
    • Patented flexure hinge design (US 7,321,706, EP 1,666,944).
    • Simple, straight-forward alignment
  • Applications
    • Precision metrology
    • Scatterometry
    • Interferometry and holography
    • High resolution Raman spectroscopy
    • Quantum cryptography
    • Photonic down-conversion
  • Downloads