In an era increasingly defined by the rapid exchange of data, Free Space Optics (FSO) is becoming the solution to transmit information quickly and wirelessly in various areas.
The innovative communication system of Free Space Optics utilizes the propagation of light through the air to transmit high-speed data.
This article will discuss the world of Free Space Optics from the definition, the mechanism of how it works, its function as providing connectivity in difficult areas, and explain the crucial regulatory landscape in Indonesia.
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Table of Contents
What is Free Space Optics?

Free Space Optics (FSO) is a communication system that uses light propagation in free space through air or free space as a transmission medium to transmit data.
Unlike communications that use fiber cable, optical fiber, or optical transmission lines, FSO is able to transmit data wirelessly. Data transmitted by FSO also has a transmission speed that is faster than traditional wireless technology.
FSO can support various types of communication, such as simultaneous transmission of Ethernet data, voice, and video, especially in environments where physical cabling is not feasible.
How Free Space Optics Works?
Free Space Optics (FSO) works by transmitting data through laser light directly through the air or free space between two points wirelessly. Here is how FSO works in detail:
- Infrared lasers transmit light: The infrared laser, as the light source, sends the modulated data towards the receiver.
- Transmission through air: The laser light signal propagates through the air in free space towards the receiver.
- The receiver captures the signal: With a telescopic lens or mirror as an antenna, the receiver captures the light signal and converts it back to an electrical signal.
- The device receives the data: The detected electrical signals are processed to be provided to the receiving device.
The Functions of Free Space Optics

Free Space Optics (FSO) has the main function of a wireless communication system in sending data through the air or free space. Here are some of the main functions of FSO:
1. Transmitting data
The main function of FSO is to transmit data. This technology is capable of transmitting data wirelessly in the form of laser light from one point to another by utilizing air or free space.
2. Provides access in difficult areas
With its wireless connectivity, FSO can access difficult areas in areas where fiber optic cables are impractical to install. This becomes a wireless solution for connectivity that can be utilized between buildings or over long distances.
3. Security
What is particularly interesting about FSO is its ability to also function as a security system. Light signals in this technology are limited to the direct path, making it more secure against eavesdropping and interception.
4. Reduce cable clutter
Another function of FSO that should not be underestimated is its ability to reduce cable clutter. By providing wireless connections, especially over short distances, this technology can help reduce the mess of fiber optic cabling.
5. As a mobile operator backhaul
Another function of FSO is to be a mobile operator backhaul. This technology can be used to provide backhaul connections for both legacy and new networks to mobile operators.
Free Space Optics Regulation in Indonesia

Free Space Optics (FSP) products sold in Indonesia must be certified by the Directorate General of Digital Infrastructure (DJID) under the Ministry of Communication and Digital (KOMDIGI). This is based on KEPMEN No. 59 Tahun 2022, which requires all radio frequency-based devices, including FSP, to meet specific technical standards before being sold in the country.
DJID certification ensures that the product meets government safety and quality regulations and does not interfere with other communication devices. The certification process involves technical testing, such as frequency adjustments, safety checks, and compatibility with the surrounding environment.
Once the tests are completed, products that pass are listed in a Test Result Report, which confirms that the product is safe and ready for sale in Indonesia. This report reassures customers that the product meets technical standards and is secure.
For companies wanting to sell a Free Space Optics in Indonesia, Type Approval Certification Services for ICT Products are available to assist with this process. This service includes preparing technical and legal documents, conducting required testing, ensuring compliance with regulations, helping companies streamline the certification process, and giving consumers confidence in certified products.










