Which organization has developed carbon-carbon nozzles for rocket engines?

The Vikram Sarabhai Space Centre (VSSC) has developed a lightweight Carbon-Carbon (C-C) nozzle, which ISRO unveiled as a major technological breakthrough in rocket engine technology. Through improvements to critical parameters such as thrust levels, specific impulse, and thrust-to-weight ratios, this breakthrough holds the potential to increase payload capacity. VSSC created a nozzle divergent with remarkable qualities by utilizing cutting-edge materials like Carbon-Carbon composites, opening the door for enhanced launch vehicle performance.