With internet going crazy on hydrogen bomb being tested in North Korea , I was curious to know whether India has hydrogen bombs too.

BRITAIN'S first 'H-bombs', tested in 1957, were not H-bombs at all, but a bluff to convince the world that Britain was still a first-rate power, according to research to be published tomorrow.

The first hydrogen bomb was detonated by the United States on November 1, 1952 on Enewetak, an atoll in the Pacific Ocean, and vaporized the islet of Elugelab.

Cold War: A Brief History The Hydrogen Bomb. I came across an article from new York times published in 1998. It was described as ‘by far the most stupendous release of explosive energy on earth so far.’
The term "device" indicates that it was an experimental explosive rather than a fully developed weapon.

The first hydrogen bomb dropped from the air exploded with a force estimated as equal to a minimum of fifteen million tons of TNT and created a fireball at least four miles wide and brighter than 500 suns.

The first hydrogen bombs Origins of the “Super” U.S. research on thermonuclear weapons was started by a conversation in September 1941 between Fermi and Teller. Exactly how to direct the energy from the first stage to the second stage was probably the most difficult problem in designing this type of bomb, however. Because the thermonuclear explosive devices used hydrogen isotopes, (deuterium-tritium fusion), the resulting bombs were often called "hydrogen bombs".The first hydrogen bomb was detonated on November 1, 1952 at the small island Eniwetok in the Marshall Islands.

In contrast, the first test of a thermonuclear weapon, or hydrogen bomb, in the United States in November 1952 yielded an explosion on the order of 10,000 kilotons of TNT. There … The hydrogen bomb is more powerful owing to its structure and setup. United States tests first hydrogen bomb The United States detonates the world’s first thermonuclear weapon, the hydrogen bomb, on Eniwetok atoll in … The First Hydrogen Bomb Had you opened your morning paper 65 years ago today, looking for news of one of the most dramatic events in history—the first explosion of a thermonuclear “hydrogen bomb” on November 1, 1952—you would have found…nothing.
Fermi wondered if the explosion of a fission weapon could ignite a mass of deuterium sufficiently to begin nuclear fusion.

Edward Teller, Stanislaw M. Ulam, and other American scientists developed the first hydrogen bomb, which was tested at Enewetak atoll on November 1, 1952. After the Soviet atomic bomb success, the idea of building a hydrogen bomb received new impetus in the United States. Details of the bomb, described only as a "nuclear device", are sketchy. In the history of the hydrogen bomb, the most powerful tested was the Tsar bomb. The Mike shot of Operation Ivy on October 31, 1952 was the first hydrogen bomb. The energy from this first stage would then be used to squeeze and heat the hydrogen in the second stage until the point where the atoms will fuse together to form helium and release energy.