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 / 685 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 TopMode 685
    Operation cw, single (fixed) frequency
    Wavelength 405 nm 443 nm 488 nm 514 nm 633 nm 685 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 25 mW
    Output power, fiber-coupled 25 mW
    (50 mW**)
    15 mW 15 mW
    (30 mW**)
    15 mW 25 mW 15 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, ∅ 1 mm, 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