Cavity fiber mirrors

High reflective, microscopic fiber-based cavity mirrors for quantum optics, microscopy, single photon sources, strong light-matter interaction, filters, ...

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Precision machined mirror profiles and high reflection coated fiber cavity mirrors from pioneers in fiber-cavity fabrication. We are the first commercial source and have more than 10 years of experience in manufacturing and operating high finesse fiber-based cavities. We offer stock and custom fibers. 

Custom cavity fibers

We manufacture fibers specially tailored for your requirements:

  • custom high reflective coating (also uncoated),
  • profile (radius of curvature, depth, ellipticity) 
  • optionally with tapered tip for better optical access and shorter cavity lengths
  • protection
  • connectorized
  • Multi-mode or single mode fibers (also some speciality fibers, multicore fibers, photonic crystal fibers, pure silica core fibers)
  • Multiple stop bands
  • Concave mirror dimples in custom silica substrates or mesa structures
150 000
Mode Volume
Radius of curvature

Stock cavity fibers mirrors

Hundreds of fibers with most common coatings and mirror profiles are available from stock.

Measured mirror profile

Planar mirrors

We also sell matching highly reflective planar mirrors (1/2" or 10x10mm). Contact us for details, specifications and prices.

Order cavity fibers

To buy cavity fiber mirrors, please contact us. We are also happy to support you to find the right micro-cavity mirror or cavity mirror pairs.

Specifications to discuss:

  • What reflectivity is needed, or what finesse?
  • What radius of curvature is needed?
  • What length should the micro-cavity be operated at (longest possible, shortest possible)?
  • Do you want to operate the fibers in vacuum?
  • Are planar macroscopic mirrors also needed?
  • Is a certain transparent band needed? What is the width of the stop-band?
  • Are multi-mode or single-mode fibers needed?
  • What is the ellipticity needed?

Buy micro-cavity fiber mirrors !

Selected Publications

Selected publications using our fibers:

  • Cavity-enhanced Raman microscopy of individual carbon nanotubes T. Hümmer, J. Noe, M.S. Hoffmann, T. W. Hänsch, A. Högele, D. Hunger Nature Commununications 7, 12155 (2016)
  • Transverse-mode coupling and diffraction loss in tunable Fabry–Pérot microcavities J. Benedikter, T. Hümmer, M. Mader, B. Schlederer, J. Reichel, T.W. Hänsch, D. Hunger New J. Phys. 17, 053051 (2015)
  • Purcell-Enhanced Single-Photon Emission from Nitrogen-Vacancy Centers Coupled to a Tunable Microcavity H. Kaupp, T. Hümmer, M. Mader, B. Schlederer, J. Benedikter, P. Haeusser, H.-C. Chang, H. Fedder, T. W. Hänsch, D. Hunger Physical Review Applied 6, 054010 (2016)
  • Cavity-Enhanced Single-Photon Source Based on the Silicon-Vacancy Center in Diamond J. Benedikter, H. Kaupp, T. Hümmer, Y. Liang, A. Bommer, C. Becher, A. Krueger, J. M. Smith, T. W. Hänsch, D. Hunger Physical Review Applied 7, 024031 (2017)
  • A scanning cavity microscope M. Mader, J. Reichel, T. W. Hänsch, D. Hunger Nature Communications 6 7249 (2015)

Full information

For all fibers white light interferometer profile data is available on request and can be tested for finesse, minimal accessible length, mode matching and polarization splitting.