Fiber-optic device acting as a high-accuracy wide-range variable optical attenuator

Yamashita, Mikio
September 1990
Review of Scientific Instruments;Sep90, Vol. 61 Issue 9, p2476
Academic Journal
A high-accuracy optical attenuator with transmission efficiencies variable in pseudobinary steps over a wide range is described that uses multilegged optical fiber lightguides and a set of optical shutters. It features excellent stability and reproducibility, and thus has proved particularly useful in some specific applications. Procedures for calibrating the relative light transmission efficiencies by the use of scintillations as a stable pulsed light source are also described in some detail.


Related Articles

  • Next generation of OTDRs are on the way. Milligan, Brian // Cabling Installation & Maintenance;Dec2002, Vol. 10 Issue 12, p21 

    Discusses developments in portable optical time domain reflectors (OTDR). OTDR merging with optical loss test sets; Evolution of OTDR standards; Optical fiber testing.

  • Materials: Fine-tuning optical fibres.  // Nature;3/17/2011, Vol. 471 Issue 7338, p269 

    The article presents the components of optical fibres in fibre-optic devices which are responsible for their fine-tuning characteristic.

  • Modified sagnac/mach–zehnder interferometer for distributed disturbance sensing. Chtcherbakov, Anatoli A.; Swart, Pieter L.; Spammer, Stephanus J.; Lacquet, Beatrys M. // Microwave & Optical Technology Letters;1/5/99, Vol. 20 Issue 1, p34 

    We propose an alternative configuration for an interferometric distributed fiber optic sensor. The sensor uses a combination of Mach–Zehnder and Sagnac interferometers sharing the same fiber. The output of the Sagnac interferometer is a function of the product of the position where the...

  • Design and performance of new ophthalmic instrument for dynamic light-scattering measurements in... Rovati, L.; Fankhauser II, F.; Ricka, J. // Review of Scientific Instruments;Jul96, Vol. 67 Issue 7, p2615 

    Describes an optical instrument for in vivo dynamic light-scattering measurements in the human eye. Results from the anterior and the posterial segment; Use of single-mode optical fibers to guide the excitation; Demonstration of the possible use of the technique.

  • Improved apparatus for picosecond pump-and-probe optical measurements. Capinski, William S.; Maris, Humphrey J. // Review of Scientific Instruments;Aug1996, Vol. 67 Issue 8, p1720 

    Presents an improved method for making pump-and-probe optical measurements in the picosecond to nanosecond time range. Use of a pump light pulse to excite the sample; Investigation of the resulting changes in the optical properties; Development of an apparatus that utilizes a single-mode...

  • Influence of the irregularity of twisting of the birefringence axes of single-mode optical fibers on the polarization nonreciprocity of fiber ring interferometers. Malykin, G. B. // Radiophysics & Quantum Electronics;Oct2004, Vol. 47 Issue 10/11, p890 

    A particular example of the so-called minimum-configuration fiber ring interferometer whose loop comprises two different-length segments of a single-mode optical fiber with the same linear birefringence but different twisting is used to show that even in the case where the birefringence axes at...

  • Optical fiber testing to the last nanometer. LOHRMANN, CHARLES C.; WAGMAN, NEIL // Cabling Installation & Maintenance;Nov2008, Vol. 16 Issue 11, p7 

    The article provides information on optical fiber testing. It discusses the application of the Optical Time Domain Reflectometer (OTDR) trace and tackles how an interferometer can lift OTDR testing to the next level. Measurement of the radius of connector curvature, offset of polish, and fiber...

  • Optical design and development of fibre coupled compact solar collectors. Sansoni, P.; Fontani, D.; Francini, F.; Jafrancesco, D.; Longobardi, G. // Lighting Research & Technology;Mar2007, Vol. 39 Issue 1, p17 

    The paper describes the design and realization of optical systems for concentrating solar light onto an optical fibre. Three different classes of optical system, with increasing surface complexity, were studied. These were collectors with spherical surfaces only, parabolic concentrators and...

  • Direct optical sensors: principles and selected applications. Gauglitz, Guenter // Analytical & Bioanalytical Chemistry;Jan2005, Vol. 381 Issue 1, p141 

    In the field of bio and chemosensors a large number of detection principles has been published within the last decade. These detection principles are based either on the observation of fluorescence-labelled systems or on direct optical detection in the heterogeneous phase. Direct optical...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics