Satinder Kumar Sikka is an Indian nuclear condensed matter physicist , crystallographer and a former Scientific Secretary to the Principal Scientific Advisor of the Government of India . He is known to have played a crucial role , along with Raja Ramanna , Rajagopala Chidambaram and Basanti Dulal Nagchaudhuri , in the design and development of a Hydrogen Bomb by India , which was tested at the Pokhran Test Range in May 1998 , under the code name , Operation Shakthi . He was also involved in the Smiling Buddha tests , conducted in 1974 . He was awarded the fourth highest civilian award of the Padma Shri , by the Government of India , in 1999
Operation Shakthi
Pokhran-II
S. K. Sikka