CHANGCHUN BENA OPTICAL PRODUCTS CO., LTD.
CHANGCHUN BENA OPTICAL PRODUCTS CO., LTD.
Email Us

Product recommendation: Off Axis Parabolic (OAP) Mirrors for high power

Table of Content [Hide]

    This indent is for procurement of “Off Axis Parabolic (OAP) Mirrors” for ultra-short high power (up to 1PW level, 25 fs, Maximum Energy 25 J) Ti: Sapphire (800 nm) laser beam focusing. The OAP mirrors shall be compatible for use in the vacuum environment (< 10 -5 mbar). Necessary quality assurance (QA) test reports as per the tender specifications should be provided. The details of OAP mirror specifications are given in the following table.

    Table 1: Technical specifications of Off-axis parabolic mirror


    S. No.ParameterNominal value
    1ConfigurationEquithick or Wedge configuration
    2Diameter (mm)250 mm + 0/-1 mm
    3Slant focal length (Reflected
    effective focal length)
    2000   ± 10 mm
    4Off axis angle (degree)12.5o  ± 0.5o
    5Clear aperture≥ 230 mm
    6MaterialGlass or equivalent substrate
    7Reflective CoatingHigh-Reflectivity, Multi-Layer Dielectric
    8Coating Reflectivity> 98.5 % for s-pol. light
    9Spectral bandwidth support
    750 – 850 nm or wider (to be used with Ti: Sa laser
    operating at central wavelength at 800 nm)750 -
    7Surface       Figure    Error
          (for
    OAP surface)
    ≤ λ/4 peak to valley at 633 nm measured over clear
    aperture,633 nm≤ λ/4
    8Surface Quality (Scratch/Dig)
    60/40 or better
    11Laser damage
    threshold
    ≥ 0.2 J /cm2 for ultra-short 20 -100fs pulses
    12Marking on OAP (for axisEtched mark should be provided on the back
    surface of the OAP showing the geometrical centre

    alignment purpose)
    and vertex direction
    13Vacuum compatibility≤ 10-5  mbar
    14Quality       Assurance      (QA)

    documents (for eachOAP)
    (1) Dimension report (mechanical sizes, slant focal
    length, Off Axis distance and angle).
     (2) Interferogram analysis of OAP surface after
    coating to assess the surface figure error over an
    area of at least of 100 mm in diameter or more.
     (3) Reflectivity curve over full wavelength range
    (750 nm - 850 nm orwider).

    The above reports should be sent to purchaser
    before shipment for approval. Final shipment is
          allowed only after approval of test reports from
                                     purchaser side.
    15Witness SampleOne witness sample (with size ≥ 25mm × 25 mm, or ≥
    diam 25mm, or of nearest standard), having identical
    substrate and coating shall be shipped along with
    OAPs at the time of delivery. The purchaser will have
    the discretion to independently evaluate the QA
    parameters and performance test on the witness
    sample for evaluation.


    Optical Components
    References