Sumitomo Optical Phase Modulator T.DE1.5-5

The T.DE1.5-5 from Sumitomo Osaka Cement Co., Ltd. is part of a family of LiNbO₃ (lithium niobate) optical modulators used in high-speed optical communications. These devices:

• Convert high-frequency electrical signals into intensity or phase changes on an optical signal (modulation).

• Are based on Mach-Zehnder interferometer (MZI) or similar electro-optic waveguide structures.

🔹 Material & Structure

• Lithium niobate (LiNbO₃) electro-optic waveguide modulator.

• Uses Mach-Zehnder interferometer architecture.

• Highly stable and reliable for telecom use.

🔹 Wavelength & Speed

• Designed for 1.5 µm (1550 nm) telecommunication window (standard for fiber-optic long-haul and metro networks).

• “5” in model T.DE1.5-5 typically indicates 5 GHz bandwidth class (approximate).

🔹 Electrical & Optical Properties

• RF bandwidth on the order of ~5 GHz (drive frequency range).

• Matched RF port impedance (typically ~50 Ω).

• Low drive voltage and good AC/optical performance typical of LN modulators.

📊 Applications

This type of modulator is widely used in:

✔ High-speed optical communication systems (e.g., OC-48 / OC-192 links)
✔ Fiber-optic transmitters and transceivers
✔ Laboratory optical modulation setups
✔ Optical test and measurement systems