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Glass-Ceramic Substrates for DWDM Thin Film Filters (WMS-15)

Photoinscribed Thick Bragg Gratings in Ohara WMS-15 Glass Ceramic

Directly photoinscribed refractive index change and Bragg gratings in Ohara WMS-15 glass ceramic

Citation: Peter A. Krug, Rodica Matei Rogojan, and Jacques Albert, "Directly photoinscribed refractive index change and Bragg gratings in Ohara WMS-15 glass ceramic," Appl. Opt. 48, 3429-3437 (2009)

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Ohara’s WMS-15 glass-ceramic substrates will enable manufacturers to produce leading edge DWDM and Gain-Flattening Filters. Our WMS substrates will facilitate the production of filters with extremely low thermal wavelength drift and low insertion loss values. WMS-15 has improved internal transmittance and exceptionally low surface roughness values.

Glass-Ceramic Substrates for DWDM Thin Film Filters (WMS)
Properties of WMS

Properties WMS-15
Specific Gravity 2.50
Young's Modulus (GPa) 96
Vickers Hardness 800
Thermal Conductivity (W/mK) 1.9
Heat Resistance (ºC) 650
CTE (x10-7/K) -30~+70 ºC 114*
Abrasion Aa (JOGIS) 31
Water Resistance RW(p)
Acid Resistance RA(p)
1
1
Total Alkali Content (Wt %) 10.9
Chemical Durability Excellent
Int. Transmittance (%) 1550nm 1mm thick 99.9
Refractive Index 1550nm (calculated) 1.524
dn/dT (x10 /K) -30~+70 ºC 1550 nm -2.1

* CTE=114 x10-7/K(-30~70°C): Standard material, Please consult us with higher CTE requirements.
* All properties are measured at room temperature except for CTE and dn/dt.
* Refractive Index and dn/dt is calculated value.
* Properties subject to change along development.

Available Products: Polished Substrate ( 1- 12inch )

 

Edge Chipping Photo Pictures

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

WMS Edge Chipping Comparison

wms03

 

 
   
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