CHL was named after the famous Dutch 17th century scientist Christiaan Huygens (1629-1695). Huygens was a fine example of a physicist who combined a vast theoretical knowledge with a feeling for practical experiments and mechanical constructions.
The Huygens principle is well known in optics and wave propagation. He is also the inventor of the pendulum clock, an early instrument to precisely measure time intervals. Even now the precise measurement of time intervals is an indispensable technique in both radar and navigation systems.
For more information: http://en.wikipedia.org/wiki/Christiaan_Huygens.