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CUPO Glass Polarizer : Products & Services

HOYA's CUPO is designed as a versatile glass polarizer for the telecommunication industry. CUPO maximizes your device performance at 0.2mm thickness and operates at 1310nm, 1480nm and 1550nm.

HOYA has developed this glass polarizer using light absorption of copper particles created by an electron plasma resonance mechanism. This polarizer contains elongated copper particles aligned along a common axis. This feature produces a high performance polarization with high isolation and low insertion loss. With thickness as low as 0.2mm, it is compact enough for the most miniaturized optical components.

HOYA's CUPO shows no performance degradation in most Telcordia environmental conditions. CUPO is particularly suited for applications in optical communication where high reliability is required.


  • High Isolation
  • Low Loss
  • High Reliability
  • 0.2mm Thickness


  • Optical Isolators
  • Liquid Crystal Switches
  • Circulators

Product Specifications

Wavelength (nm) 1310 1480 1550
Isolation (dB) > 40 > 40 > 40
Insertion Loss (dB) < 0.1 < 0.1 < 0.1
Refractive Index 1.475 1.473 1.472
Reflectance % (AR coating both sides) 0.15 0.15 0.15

Thermal Properties
Transformation Temperature (Tg) 477°C
Sag Temperature (Ts) 545°C
Coefficient of Thermal Expansion 63.4 x 10-7/°C
Mechanical Properties
Young's Modulus 62.4 GPa
Shear Modulus 25.5 GPa
Poisson's Ratio 0.221
Knoop Hardness 433 kgf/mm2
Physical Properties
Specific Gravity 2.31

Reflectance Spectrum

Note: The listed data are standard value. Because of continuous product improvement, the various data listed are subject to change without notice.