CSIP: PRELIMS BOOSTER SERIES -464 Science and Technology


Laser Communication


NASA’s Lunar Reconnaissance Orbiter (LRO) has successfully pinged India’s Chandrayaan-3 mission‘s Vikram lander on the Moon using a laser instrument.

Laser Communication

Laser communication, also known as optical communication or free-space optical communication, is a method of transmitting information using modulated laser beams. It works by encoding data onto a laser beam, which is then transmitted through the air or space to a receiver. The receiver converts the laser beam back into data, which can then be used for a variety of purposes.


  • It can transmit much more data per second. This is because laser light has a much shorter wavelength than radio waves, which means that it can carry more information.
  • Laser communication is less susceptible to interference from other sources, such as radio waves and microwaves. This is because laser beams are much more directional than radio waves, whichh means that they are less likely to be picked up by unintended receivers.
  • Laser communication is more secure than RF communication because it is more difficult to intercept and eavesdrop on.


  • Space communication: Laser communication is used to transmit data between satellites and between satellites and ground stations. This is especially important for missions that require high data rates, such as sending high-definition images and videos back from space.
  • Fiber optic communication: Fiber optic cables use laser light to transmit data over long distances. This is the backbone of the internet and is also used for other applications, such as cable TV and telephone service.
  • Free-space optical communication: Free-space optical communication uses laser light to transmit data over short distances through the air. This is used for a variety of applications, such as connecting buildings on a campus or providing high-speed internet access to rural areas.

Laser communication is a rapidly developing technology with the potential to revolutionize the way we communicate. As laser technology continues to improve, we can expect to see even more applications for this versatile technology.