High Coefficients of Thermal Expansion (CTE)Suitable for producing low thermal drift filtersLow surface roughness & flatness valuesHigh transmission helps to provide low insertion lossSuperior machining - less edge chipping on the filtersExcellent physical properties & chemical durabilityAvailable as polished substrates - from 1" to 12" diameter

WMS-15WMS-15

ADVANTAGESADVANTAGES

O H A R A C O R P O R AT I O N

www.oharacorp.com

Oharaʼs WMS-15 glass-ceramic substrates willenable manufacturers to produce leading edgeDWDM and Gain-Flattening Filters.Our WMS substrates will facilitate the productionof filters with extremely low thermal wavelengthdrift and low insertion loss values. WMS-15 hasimproved internal transmittance and exceptionallylow surface roughness values.

Glass-Ceramic Substrates forDWDM Thin Film Filters (WMS)

Diamond #600 (Metal Bond)Wheel dia 100mm (2400 rpm)Machine speed 4mm/min

O H A R A C O R P O R AT I O N

23141 Arroyo Vista #200Rancho Santa Margarita, CA 92688Tel: (949) 858-5700Fax: (949) 858-5455www.oharacorp.com

50 Columbia RoadBranchburg, NJ 08876Tel: (908) 218-0100Fax: (908) 218-1685

Glass WMS-15

1.5mm

2.0mm

1.5mm

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The WMS-15 glass ceramic substrates are less proneto edge chipping than amorphous glass substrates.

Glass-Ceramic Substrates forDWDM Thin Film Filters (WMS)

2.50968001.9650114*311110.9Excellent99.91.524-2.1

Specific GravityYoung's Modules (GPa)Vickers HardnessThermal Conductivity (W/mK)Heat Resistance (ºC)CTE (x10-7/K) -30~+70 ºCAbrasion Aa (JOGIS)Water Resistance RW(p)Acid Resistance RA(p)Total Alkali Content (Wt %)Chemical DurabilityInt. Transmittance (%) 1550nm 1mm thickRefractive Index 1550nm (calculated)dn/dT (x10 /K) -30~+70 ºC 1550 nm

*CTE=114 x10 - 7/K(-30~70°C): Standard material, Please consult us for higher CTE requirements.All properties are measured at room temperature except for CTE and dn/dt.

Please note there is a tolerance on the CTE values. Properties subject to change without notice.

Properties WMS-15

Refractive Index and dn/dt is calculated value.

Properties of WMSProperties of WMS