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Polarization Maintaining (PM) Patch Cords come in many flexible configurations, with choice of connectors. SQS PM Patchcords shows excellent environmental stability, high extinction ratio, high return loss and low polarization dependence.

PM patch cords are built with polarization maintaining panda, bow?tie, or elliptical cladding fiber and assembled with FC/UPC, FC/APC, SC/UPC, SC/APC or LC connectors. FC connectors may be supplied with a wide key (2.14 mm, N type) or a narrow key (2.02 mm, R key). PM patch cords may be supplied in 250µm bare fiber, 900µm buffered fiber or 3mm cable. PM patch cords feature low insertion loss, high extinction ratio and high return loss. Slow or fast axis may be aligned to the connector key.

SQS fiberoptic cable assemblies are manufactured and tested to the most rigorous industry standards. Their optical and mechanical performance meets corresponding IEC specifications.

SQS assembly technology for PM fiber connectors, has been protected by a patent No. 295401

Design:

  • special ceramic ferrule, compatible with FC with narrow key
  • high extinction ratio up to 35 dB/1550nm
  • široký rozsah vlnových délek
  • wide wavelength range
  • low angle misalignment
  • combination with fiber arrays

Applications:

  • sensors
  • WDM systems, optical amplifiers
  • laboratory works
  • interferometric polarization modulators
  • high bit rate telecommunications
Catalog Sheet for Download in PDF pdf ikona

 PM Connectors

Design Type: 405 460 630 780 980 1310 1550
Wavelength Range [nm] : 400-680 460-630 630-780 780-980 980-1300 1280-1340 1490-1620
Insertion Loss IL (max) [dB] : 1.8 1.5 1.2 0.8 0.6 0.5 0.4
Insertion Loss IL (typ) [dB] : 1.5 1.2 0.9 0.5 0.4 0.3 0.2
Extinction Ratio (min) [dB] : 20 20,25 20,25 20,25 20,25,30 20,25,30 20,25,30
Core/Cladding Size : 3/125 3/125 4/125 5/125 6/125 9/125 10/125
Return Loss RL (UPC ver.) [dB] : > 50 ( typical 55 )
Return Loss RL (APC ver.) [dB] : > 60 ( typical 68 )
Angle Misalignment Θ (Real axis) [°]: ± 2.5 or ± 1.5
Repeatability (500 matings) : ± 0,2
Connector type : FC, SC, MU, LC
Operating Temperature [°C] : - 20 to 70
Storage Temperature  [°C] : - 40 to 80

 

PM Connectors FKK/UPC

Connector Modified FC Connector for Ultra high PER
IL (typ) [dB] : 0,2 (@ 1310 nm)
PER [dB] : > 35
Angle Misalignment Θ (Real axis) [°]: ± 1,5 / ± 0,8
Applications : High speed detectors, sensor technique

 

Úhlové odchylky a geometrické osy

Real vs. Geometrical axis of PM fiber Angle misalignment (Θ)
geometrical axis pm fiber angle misalignment
Geometric axis (fast and slow) are given by stressors inside fiber  where  direction of stressors is identical  with slow axis (picture 1). The real axis appears if we apply  adhesive inappropriately and start to stress fiber core additionally (picture 2). Angle misalignment Θ inform us how precisely is connector assembled on PM fiber. It means what is maximum angle between real axis of glued fiber and axis of connector’s key. Angle misalignment affects total PER during mating two PM connectors.