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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.

Properties WMS
Material Type> Glass-ceramics
Specific Gravity
Young's Modulus (GPa)
Vickers Hardness 800
96
Abrasion Aa 31
Heat Resistance (C) 650
Thermal Conductivity (W/(mK)) 1.9
CTE -30~70C (10-7/K) 114
Water Resistance RW(P)JOGIS 1
Acid Resistance RA(P)JOGIS 1
Internal Transmittance 1550nm 1mmt(%) 99.9
Refractive Index 1550nm 1.524
dn/dt -30~70C (10-6/K) -2.1
* CTE=114 x10-7/K(-30~70C): 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