Compare Model Drawings, CAD & Specs Diameter Effective Focal Length (EFL) F/# Edge Thickness (Te) Availability Price
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12.7 mm 50 mm 3.9 9.53 mm
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25.4 mm 50 mm 2 6.35 mm
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25.4 mm 250 mm 9.8 6.35 mm
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25.4 mm 500 mm 19.7 6.35 mm
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25.4 mm 1000 mm 39.4 6.35 mm
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For flat ultrafast pump mirrors, click here

Specifications

  • Wavelength Range
    710-890 nm
  • Mirror Shape
    Concave
  • Material
    N-BK7
  • Coating Type
    Broadband ultrafast pulse coating
  • Coating Code
    UF.20
  • Angle of Incidence
    0-15°
  • Reflectivity
    UF.20: RS, RP>99% @ 710-890 nm
  • Damage Threshold
    0.144 J/cm2 @ 800 nm, 49 fs,100 Hz
  • Surface Accuracy, Power
    ≤2.5λ @ 632.8 nm
  • Surface Accuracy, Irregularity
    ≤λ/5 @ 632.8 nm
  • Surface Quality
    15-5 scratch-dig
  • Back Surface
    ≤λ/10 @ 632.8 nm (AR.14 coated)
  • Thickness Tolerance
    ±0.25 mm
  • Diameter Tolerance
    +0/-0.25 mm
  • Clear Aperture
    ≥central 80% of diameter
  • Chamfers
    0.25-0.76 mm face width
  • Chamfers Angle Tolerance
    45 ±15°
  • Cleaning

Features

High Reflectance for NIR Applications

The High Reflecting Pump Mirrors for Ultrashort Pulses have over 99% reflectance from 710-890 nm for both s- and p-polarization. This enables maximum efficiency for peak power sensitive ultrafast laser applications. Mirrors are optimized for 0-15° AOI.

AR Coating for Argon and Frequency Doubled Nd:YAG lasers

The back surface of the pump mirrors has an AR coating optimized for transmission from 488-532 nm. This enables 488 and 514 nm argon laser, or 532nm frequency double Nd:YAG pump beams to transmit effectively.

High Optical Quality Substrates

Our ultrafast laser pump mirrors feature BK-7 substrates. The mirrors have surface flatness better than λ/10, and surface quality of 15-5 scratch-dig.

Transient Absorption Spectrometer Applications

In Transient Absorption Spectroscopy, a specimen is illuminated with a broad supercontinuum source (typically routed using ultrafast reflective optics to minimize overall chirp). The sample is intermittently excited using an pump beam. Dynamics of a material can be studied by analyzing transmitted frequency using a spectrometer.

Slight Wedge to Suppress Interference Effects

Our ultrafast mirrors may be used as dichroic mirrors in pump probe laser applications. The mirrors have a 30 arc minute wedge angle to suppress interference fringes for the transmitted beam. Note that performance outside of the specified wavelength range cannot be guaranteed.

N-BK7 Substrates

N-BK7 is a relatively hard Borosilicate glass that offers good scratch resistance with a very low level of inclusions. For more information, refer to the optical material technical note.