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Optical Fibers

Ideally suited for TOPTICA's tunable diode lasers

  • Polarization Maintaining (PM)
  • High Power, AR, and fiber splitters/combiners
  • Wide wavelength coverage (350 nm .. 1625 nm)
  • Ideal match for FiberDock & FiberOut
  • Individual fiber options for various applications

TOPTICA Photonics AG offers a wide range of optical fibers ideally suited for use with TOPTICAs lasers and FiberDock. These economically priced fibers cover a wide range of wavelengths. TOPTICA recommends to always purchase a fiber along with a laser and fiber coupler, as this ensures maximum fiber coupling efficiency. Also specialty fibers for power monitoring, beam splitting or combining are available with various ratios and also polarization maintaining. Please enquire.

  • Specifications

    TOPTICAs laser systems generally produce light that is diffraction limited or at least nearly so. It can therefore be coupled efficiently into single-mode fibers. Coupling single-mode light into a multi-mode (MM) fiber will result in a loss of brightness, although the coupling efficiency might be better and the coupling is less sensitive to misalignment – the output of the MM fiber will generally be multi-mode. To preserve the favorable properties of single-mode light, it should be coupled into single-mode (SM) fibers.

    Coupling polarized light into a single-mode fiber will result in random polarization at the output of the fiber, because the fiber is generally slightly birefringent. As this birefringence changes with temperature and movement/bending of the fiber, also the output polarization of a SM fiber varies.

    Polarization maintaining (PM) fibers can preserve the input polarization under certain circumstances. In PM fibers, a strong birefringence is introduced intentionally in a controlled way, and coupling linearly polarized light into a PM fiber along one of its principal axes will maintain the polarization. The polarization crosstalk from one axis to the other is generally smaller than -25 dB/100 m, for wavelengths below 480 nm smaller than -20 dB/100 m. The key of PM fibers is mostly aligned along the slow axis, and this is normally the axis along which the polarization is coupled into the fiber. TOPTICAs fiber coupler FiberDock offers a degree of freedom to rotate the fiber around its axis to optimize this alignment.

    Normally, every fiber facet introduces 4% loss, reducing the theoretical maximum transmission through a fiber to 92%. Anti-reflection coated (AR) fibers reduce these reflection losses to below 1%, so that the power behind the fiber can be increased by 6-8%. The AR coating withstands high powers, but is not suited for physical contact (PC) fiber-to-fiber coupling. AR coated fibers are available at many wavelengths upon request.

    High power (HP) fibers are recommended for powers greater than 1000 mW in the infrared, and 100 mW in the visible. The output beam from high power fibers shows very little distortion with M² << 1.1.

    TypeWavelength RangeConnectorsCutoffMFDNALengthJacketFiber
    PM Patchcords
    PM350 - 440 nm2 x FC/APC< 340 nm2.3 .. > 2.60.123 m3 mm PVC#OK-000676
    PM350 - 440 nmFC/APC-FC/PC< 340 nm2.3 .. > 2.60.123 m3 mm PVC#OK-000867
    PM405 - 480 nm2 x FC/APC< 400 nm3.80.113 m3 mm PVC#OK-000633
    PM480 - 630 nm2 x FC/APC< 470 nm3.80.113 m3 mm PVC#OK-000677
    PM480 - 630 nmFC/APC-FC/PC< 470 nm3.80.113 m3 mm PVC#OK-000868
    PM630 - 820 nm2 x FC/APC< 620 nm4.50.113 m3 mm PVC#OK-000678
    PM630 - 820 nmFC/APC-FC/PC< 620 nm4.50.113 m3 mm PVC#OK-000913
    PM810 - 980 nm2 x FC/APC< 800 nm5.50.113 m3 mm PVC#OK-000679
    PM980 - 1300 nm2 x FC/APC< 970 nm6.60.113 m3 mm PVC#OK-000661
    PM1290 - 1550 nm2 x FC/APC< 1280 nm9.50.113 m3 mm PVC#OK-000680
    PM1460 - 1625 nm2 x FC/APC< 1450 nm10.50.113 m3 mm PVC#OK-000319
    AR/HP Patchcords
    PM/HP375 - 488 nm2 x FC/AFC + HP< 370 nm4.50.073 m3 mm PVC#OE-000592
    PM/HP460 - 640 nm2 x FC/AFC + HP< 450 nm4.00.093 m3 mm PVC#OE-000874
    PM/AR760 - 855 nm2 x FC/AFC + AR< 760 nm5.50.113 m3 mm PVC#OE-000660
    PM/HP760 - 980 nm2 x FC/AFC + HP< 760 nm5.50.113 m3 mm PVC#OE-000796
    PM940 - 1100 nm2 x FC/APC< 930 nm6.60.123 m3 mm PVC #OE-000799
    PM/AR1460 - 1620 nm2 x FC/AFC + AR< 1460 nm10.50.093 m3 mm PVC#OK-001293
  • Options

    Isolation is often required for diode lasers to protect them from back reflections. For grating stabilized diode lasers like TOPTICAs scientific diode laser series, optical isolation is mandatory for reliable single frequency operation if the laser is fiber coupled. Depending on the laser, single stage or double stage isolators are recommended.

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