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Fiber Optic Delay Lines

    Features / Benefits
  • Small 1 RU Rack Mount Enclosure holds up to 45 km of fiber, 2 RU 90 km
  • Multiple spool or multichannel configurations available
  • Custom length configurations available
  • Simplex and Duplex Units
  • Low insertion loss
  • Rugged construction

  • Applications
  • System emulation of loss, length, time delay and reflectance
  • Network Simulation
  • Temporary connections to OTDRs, Power Meters, Talksets, Demo Equipment, Light Sources, Data & Telecom Equipment and Dark Fiber
  • Product Demonstrations, Equipment Calibration
  • Optical buffer for optical networks
  • Laser spectroscopic measurement
  • Time delay for opto-electronic oscillators
  • Optical network testing and analysis
  • Optical packet switching, buffering, routing and input/output synchronization
  • Use in conjunction with fiber optic transceivers, transmitters and receivers for radar testing, signal processing, phased antenna array and phase noise testing


The D8 Series Compact Fiber Optic Delay Line is available in virtually any length up to 45 km housed in 1 RU or 1.75” high enclosure or 90 km in a 2 RU or 3.5" high enclosure. All units are built custom to meet your specific requirements.

Simply specify the length or time delay required and connector choice for the input and output bulkheads. Dual spool or Multichannel units are also available.
DimensionsLength 19”, Width 13”-18", Height 1.75”-3.5"
BulkheadsFC, ST, SC, FC/APC, SC/APC, LC, LC/APC
Fiber Length90 km (max)
Optical Delay12us to 440us
Fiber TypeSinglemode (9/125)
Wavelength (nm)1050 to 1625
Insertion Loss<0.3dB/km typical, <0.5dB/km max
Storage Temp.-40° to +85° C
Operating Temp.-40° to +85° C
Weight3.5 lbs (w/out fiber)
The table shown below displays the part number template for ordering. Simply choose the bulkhead style required for the input and output ports, bulkhead placement and the length required (in meters). Dual spool or duplex configurations also available. All units are build custom to meet your specific requirements. Units typically ship within 2-3 weeks. Please contact a sales representative for prices and delivery or click here to fill out our contact form.

Dual Spool Rack Mount Delay Line


Simply specify the length or time delay required and connector choice for the input and output bulkheads. Dual spool or Multichannel units are also available.

Dual Spool Rack Mount Delay Line