Polyimide-based electrooptic materials

Conference · Sun Aug 01 04:00:00 EDT 1993

OSTI ID:10182019

Cahill, P A; Seager, C H; Meinhardt, M B ^[1]; Beuhler, A J; Wargowski, D A ^[2]; Singer, K D; Kowalczyk, T C; Kosc, T Z ^[3]

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1. Sandia National Labs., Albuquerque, NM (United States)
2. Amoco Chemical Co., Naperville, IL (United States)
3. Case Western Reserve Univ., Cleveland, OH (United States). Dept. of Physics

The properties of new, high temperature optical materials based on dye-doped Ultradel{reg_sign} 9000D{sup 1} polyimides are presented. Ultradel 9000D is a soluble, pre-imidized, fluorinated polymer with properties optimized for integrated optical applications. When thermally or photochemically cross-linked, it has a Tg approaching 400{degree}C and retains excellent optical transparency as measured by both waveguide loss spectroscopy (WLS) and photothermal deflection spectroscopy (PDS). The agreement between WLS and PDS data indicates that losses in polyimides are due to absorption, not scattering. Two thermally stable, donor-acceptor oxazole-based dyes were designed, synthesized, and doped into the polyimide at concentrations up to 25 percent by weight. The Tg of the doped polymers decreased from the neat polymer, but remained above 300 {degree}C. The effects of doping on the dielectric constant, refractive index, and coefficient of thermal expansion of the polyamide are presented. The oxazoles also photobleach and thereby provide an additional means of photodefining waveguides in these materials.

• Research Organization: Sandia National Labs., Albuquerque, NM (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 10182019
• Report Number(s): SAND--93-0336C; CONF-930722--28; ON: DE93019416
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360606
440600
47 OTHER INSTRUMENTATION
CURING
DIELECTRIC PROPERTIES
DYES
ELECTRO-OPTICAL EFFECTS
IMIDES
LIGHT SCATTERING
MATERIALS
OPTICAL INSTRUMENTATION
OPTICAL PROPERTIES
ORGANIC POLYMERS
OXAZOLES
PHYSICAL PROPERTIES
REFRACTIVE INDEX
SPECTROSCOPY
STABILITY
USES
WAVEGUIDES