-What was your role in the LIGO project?
HP: The LIGO project is focused on detecting gravitational waves and extracting information from them. Detecting these waves, which can be imagined as ripples in a vast pond (the universe), helps gather data about cosmic events, enabling us to understand phenomena occurring far out in space that regular telescopes can't see.
I was involved in multiple ways along the project. Initially, I worked on the large stainless steel platforms that decouple the laser optics from ground vibrations - this ensures that minor disturbances like someone walking nearby or a distant truck don’t affect the measurements. Such isolation is crucial because gravitational waves are incredibly subtle by the time they reach Earth, and even a slight misalignment in the laser can cause significant data loss.
My work started during my master's internship at MIT, where I focused on active controls, developing filters that would allow the platforms to react based on data from sensors setup upstream. Preemptive adjustment helped maintain the stability of the platforms ahead of ground vibrations reaching them. Later, at the Washington State Hanford site, I continued this work, commissioning platforms, updating software, and I contributed to improving the seismic isolation systems that now meet unprecedented performances.
All this work required handling sensitive software tools, which led me to joining the Stanford University LIGO team , where I worked on software updates for the project. I’d take signals off from here, put it there, filter, blend, make sure it doesn’t go and make a mad feedback loop - a bit like a modular.
The project made its first gravitational wave detection in 2016. It was a monumental discovery, but it couldn’t be announced right away. When you make a detection like this, the whole scientific community is watching. You only get one shot with the announcement. You definitely don’t want to miss it. We had to keep it a secret for months, the time for the data to be diligently combed through.. I told absolutely no one. I felt like a special agent with classified information. It was a very unique and exciting.