Fiber Optic Probes

FiberTech Optica can support custom fiber optic probes including those with multiple fiber types, incorporated lenses and complex fiber configuration. We can help from the initial design phase to insure the final design meets the needs of the application.

Reflectance Probes

FiberTech Optica manufactures custom reflectance/backscatter probes to optimize reflection and fluorescence measurements from solid surfaces or backscattering and fluorescence in liquids and powders.

Typically using 7, 19, 37 or 61 fibers with a center illumination or collection fiber, probes can include different fiber sizes and types. The center fiber can be isolated to avoid cross-talk.


  • Bifurcated and multi-branch configurations
  • Round-to-Round, Round-to-Line, Line-to-Line patterns
  • Flat & angle surface ends
  • Incorporated filters and micro optics
  • Probe body materials: Stainless steel, brass, aluminum, PEEK, others
  • Custom fiber arrangement (random, scrambled or mapped)
  • Fiber materials: Fused silica, hard polymer clad silica, polymer clad silica, borosilicate glass bundle, ZBLAN fluoride and plastic (POF)
  • Fiber type:  Multimode step-index and graded-index fibers, singlemode fibers
  • Fiber geometry: Round, square, rectangle, octagonal
  • Numerical aperture (NA): 0.10 to 0.66
  • Wavelength coverage: options spanning from Deep-UV to MIR (190 to 4500 nm)
  • Standard (SMA-905, FC, ST, etc.) or custom connectors, custom design ferrules
  • Sheathing: Furcation tubing, PVC monocoil, silicone monocoil, polyurethane, stainless steel, peek, PTFE, others upon request
  • Standard temperature range: -40 °C to + 100 °C; both cryogenic and high temperature (up to 280 °C) available
  • Additional options: high vacuum compatibility, chemical resistance
  • Length up to 100 m, even for multi-fiber assemblies


  • Rugged design for harsh environment
  • Low crosstalk
  • Optimized throughput
  • Improved process performance
  • Increased repeatability and reliability

SORS Probes

Raman spectroscopy is traditionally a surface measurement technique.  However, methods such as Spatially Offset Raman Spectroscopy (SORS) that collect backscatter data at different distances enable its application for obtaining depth-resolved sample composition. This is useful in some biomedical and pharmaceutical applications where understanding of process time dependence can be important.

Building upon our extensive expertise in design and fabrication of custom fiber optics assemblies, bundles, probes and arrays, FTO has developed in-house capabilities to machine and modify precision optical components such as filter and lenses. This enables us to produce high performance Spatially Offset Raman Spectroscopy (SORS) probes with internal filtering for deep spectroscopy of tissue and powders.


  • Enable simultaneous collection of multiple Raman spectra
  • Arbitrary spatial offset positioning
  • Arbitrary number of collection points


  • Tailoring of the collection parameters to the sample
  • Potential higher sensitivity and penetration depths


  • Analytical spectroscopy (UV/VIS, NIR, MIR, Raman)
  • Analytical chemistry
  • Raman scattering
  • Process control
  • Research & Development
  • Optical sensing
  • Thomson scattering
  • Fluorescence excitation
  • Illumination
  • OCT (Optical Coherent Tomography)
  • Particle detection
  • In-vivo diagnostics
  • Clinical research
  • Smart structures


  • Academia
  • Aerospace
  • Astronomy
  • Defense & Military
  • Dentistry
  • Environmental monitoring
  • Fine chemicals
  • Food processing
  • Forensics
  • Fusion development
  • Life sciences
  • Biomedical imaging
  • Nuclear Power
  • Petrochemicals
  • Pharmaceutical
  • Semiconductor
  • Solar energy