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Monochromator Fiber Adapters
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Newport offers a variety of accessories to couple fiber optic cables to Oriel monochromators and spectrographs. Models are available for a range of applications and budgets, ranging from economical solutions to Newport’s high performance F/# matcher.

 

·         F/# matcher for increasing throughput, while decreasing stray light

·         Efficient couplers for rectangular fiber bundles

·         Economical adapter for standard 11mm ferrule terminations

·         Quick connect ferrule adapters

 

 

F/# matcher for increasing throughput, while decreasing stray light

Newport’s model 77529 is a fiber optic f/# matcher. When light from a fiber optic is sent directly into a monochromator or spectrograph, energy is lost if the output angle of the fiber optic is larger than the input angle of the monochromator, and/or if the fiber size is larger than the slit size. The 77529 is suitable for use with fused silica fibers, not glass fibers. The reflective optics operate from 190 nm to 24 µm. The 77529 has precise X,Y and Z focus adjustment for optimal alignment of the fiber image with the monochromator slit. It has a 1.5-Inch Series female Quick Connect flange and an adapter to hold any Oriel Fiber with standard or Quick Connect 11 mm ferrule. The 77529 also has a #1/4-20 threaded hole, as rod mounting is suggested for additional support. The 77529 works by increasing the f/# of the beam from a fiber optic cable by 2x, matching the fiber output to the input required by Oriel monochromators and spectrographs. The advantages of using the 77529 in many cases are to increase throughput, while decreasing stray light inside the instrument. For imaging applications, the image is magnified by a factor of 2x. The 77529 may also be used at the output of a monochromator to couple light into an output fiber. In this case, the slit image is de-magnified by a factor of 2x.

 

 

 

Efficient couplers for rectangular fiber bundles

"Models 78854, 78855, 78856 adapters hold the rectangular end of our Large Slit Rectangular to Circular Fiber Optic Bundles at the input of Oriel Monochromators and Spectrographs or other flanged components. These fiber adapters hold the rectangular end of the “Large Slit” Fiber Bundles at the input of Oriel Monochromators. The fiber replaces the slit. These fiber adapters do not require a fixed slit holder for mounting; they couple directly to the aperture of the monochromator (see Fig. 1).

When used at the input, much of the light from the fiber overfills the grating and is lost. This is especially true for glass bundles. Even so, the simplicity and convenience of this technique ensures its application when there is plenty of light, and stray light is not a major concern. When this isn’t the case, use the 77358 Adapter. When you use the 77854 /5/6 fiber slit at the output, the bundle accepts all the light, which falls on the “fiber slit.” Be sure to choose a matching input fixed slit, or set the variable slit to match the “fiber slit.”

The 77358 couples the rectangular end of a Large Slit Fiber Bundle to a monochromator slit. If you are working with a fused silica bundle, use the 77358 with the Focusing Lens Assembly. The 77330 will then focus the bundle’s image onto the monochromator input slit. For glass bundles, you may couple the bundle directly to the monochromator slit using only the 77358 ’s spacer tube (the 77330 is not required)."

 

 

 

Economical adapter for standard 11mm ferrule terminations

Models 77860 adapter couples a single channel Oriel Fiber Bundle to the input of Oriel Monochromator or Spectrographs for our 11 mm standard ferrules . The 77860 adapter holds fiber bundles with an 11 mm standard ferrule termination. It holds the bundle against the slit of any Oriel Monochromator or Spectrograph (instrument must have a fixed slit assembly). We also use this coupler to hold single fibers at the entrance slit to a monochromator or spectrograph, with the addition of the 77670 or 77675 Converter on the end of the fiber. These converters change an SMA or ST termination into an 11 mm standard ferrule.

 

 

 

 

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