Craig Cahillane

4th Year Physics Grad Student at Caltech
Work in Experimental Gravity forLIGO Logo the Laser Interferometer Gravitational wave Observatory.

I am currently a LIGO Science Collaboration Fellow at LIGO Hanford Observatory. I am working on feedforward of control signals from some interferometer degrees of freedom to others for reduced noise in DARM, the degree of freedom most important for detecting gravitational waves. I am also thinking about laser frequency noise in the interferometer, in particular the CARM control loop which is responsible for making LIGO the most stable laser in the world.
Additionally, while at Caltech I run the Coatings Thermal Noise laser optics lab under Professor Adhikari. We are investigating coatings thermal noise for AlGaAs coatings using two 3.68 cm Fabry-Perot optical cavities. AlGaAs is a candidate optical coating for next-generation gravitational-wave detector optics, so characterization of its thermal noise properties is required for the future of gravitational wave astronomy.

Pasadena, California

Rockford, Illinois

Honolulu, Hawaii

Notre Dame Logo Notre Dame 2014. Graduated with degrees in Physics and Computer Science.

Tier 1: Python, C/C++, MATLAB, Unix
Tier 2: Javascript, Git

Spectrum Analyzers: SR785, Agilent A4395A, HP8560E
Oscilloscopes: Tektronics 3032 and 3034
Skills: Soldering, Circuit Design, Control Systems, Optics, General Lab Management

Passed Caltech Machine Shop Course ME113
Trained on the Lathe, Mill, Bandsaw, Drillpress, Laser Printer, 3D Printer, and Waterjet.

2015-2017 LIGO Outreach Lead.
Organized ~15 trips to local elementary and high schools, and even more talks to schools out of state, including Notre Dame.
Developed new outreach demonstrations, including the Black Hole Merger Demonstration which simulates gravitational wave emission from black hole binaries near the end of their lives.
I created an interactive Fabry-Perot optical cavity to visualize how lasers and mirrors interact in a simple two-mirror resonator.

Cosmoslogy, Astrophysics, Lasers, Optics, Control Systems, Golf, Tennis, Frisbee, Notre Dame Football, Arduino, Raspberry Pi


Shot Noise Calculator
Latest Coatings Thermal Noise Budget in my lab at Caltech
Interactive Fabry-Perot Optical Cavity Animation in Javascript
Blood Alcohol Content Estimator in React


First Author:
Calibration Uncertainty for Advanced LIGO's First and Second Observing Runs (arXiv version)

Full Collaboration Papers:
GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
Observation of Gravitational Waves from a Binary Black Hole Merger

Created by Craig Cahillane
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