There are several foundry fabs in different regions that are capable of manufacturing InP (Indium Phosphide) based photonic integrated circuits (PICs) based on custom designs. Here are two well-known foundry fabs that specialize in InP-based PIC fabrications.

Be noted the availability of foundry services for custom InP-based PIC designs may change over time, and recommend to contact the foundry fabs directly for further information.

Wish you have a good luck to make it.

[Asia]

1) CompoundTek Pte Ltd: CompoundTek is a Singapore-based foundry fab that specializes in a wide range of photonic technologies, including InP-based PICs. They offer foundry services for InP-based PIC fabrication, including design, prototyping, and volume production. CompoundTek has a state-of-the-art facility with advanced equipment and processes for InP-based PIC fabrication and has collaborated with various companies and research institutions in Asia and around the world.

2) National Nano Device Laboratories (NDL): NDL is a research institute based in Taiwan (i.e. my home town) that offers foundry services for InP-based PIC fabrication. They have expertise in the design, fabrication, and testing of InP-based PICs, including custom designs for various applications, such as optical communications, sensing, and quantum optics. NDL has a strong research focus on photonic technologies and they are willing to collaborate with international partners on InP-based PIC development.

[US]

Oclaro Inc. (part of Lumentum Holdings Inc.): Oclaro is a provider of optical communication components and modules, and they offer foundry services for InP-based PIC fabrication. They have expertise in various aspects of InP-based PIC manufacturing, including wafer fabrication, device packaging, and testing. Oclaro's foundry services are used by many companies and research institutions for custom PIC designs.