Although quantum radar frequently dominates discussions about the future of stealth detection, insiders familiar with India's military research confirm that photonic radar is much closer to being deployed on combat aircraft.
The Defence Research and Development Organisation (DRDO) has achieved critical milestones in creating a homegrown photonic radar system. This technology is currently advancing toward integration tests across various military platforms.
In contrast, quantum radar is still largely restricted to global laboratory studies due to massive physics and engineering hurdles that are not expected to be solved soon.
Understanding this difference is crucial because, while both are often labelled as "next-generation" sensors, they currently exist at completely different levels of practical readiness.
Traditional Active Electronically Scanned Array (AESA) radars depend on radio-frequency (RF) electronics for signal generation and processing.
Photonic radar, however, utilizes light-based technology, incorporating lasers, photonic integrated circuits (PICs), and optical signal processors.
This innovative approach allows the system to produce extremely wide-band signals with minimal noise, significantly enhancing accuracy and cutting down on electromagnetic interference.
Reports show that the DRDO’s Electronics and Radar Development Establishment (LRDE) in Bengaluru has successfully built India's first domestic photonic radar, with valuable contributions from the private sector.
The laboratory is now gearing up for phased testing. The evaluation strategy will begin with stationary ground units, progress to unmanned aerial vehicles (UAVs) and naval ships, and ultimately lead to airborne trials on advanced fighter jets like the Su-30MKI, Rafale, and the indigenous Tejas.
The benefits of utilizing photonic radar go far beyond simply increasing detection ranges. Generating signals optically delivers a much higher bandwidth—operating at around 11 gigahertz—than standard RF systems.
This results in sharper target resolution, allowing the system to achieve a high resolution of roughly 1.3 centimetres. This incredible precision helps in distinguishing closely flying targets or even spotting tiny rotating drone blades, which is critical in modern aerial warfare where pilots must track numerous high-speed threats at the same time.
Another significant advantage is its robust defence against electronic warfare. Today's combat zones are filled with advanced jammers meant to confuse or disable standard radars.
Because photonic systems process data optically before converting it to an RF output, they are naturally more resistant to electronic jamming, ensuring reliable performance even in highly contested environments.
Experts also note that photonic radar will greatly enhance the ability to spot stealth aircraft. While no technology can make stealth completely useless, the wider bandwidth and excellent signal clarity of photonic designs make it much easier to detect faint radar bounces from low-observable threats that traditional radars would lose in background static.
Crucially, implementing photonic radar is a practical, evolutionary step rather than a complete overhaul. It relies on established radar fundamentals and can theoretically be fitted onto next-generation fighters without requiring massive changes to pilot procedures or basic radar operations.
This adaptability makes it a highly feasible upgrade for armed forces over the next ten years.
On the other hand, the outlook for quantum radar is drastically different.
This theoretical technology relies on advanced quantum mechanics, specifically concepts like quantum entanglement and illumination. Theoretically, these methods could separate incredibly faint return signals from environmental noise, which would greatly improve the tracking of stealth jets.
However, military scientists state that turning this theory into a functioning airborne radar is one of the toughest engineering problems in contemporary physics.
A primary hurdle is the need for extremely sensitive quantum detectors that must be kept at cryogenic temperatures, near absolute zero.
Creating and maintaining this freezing environment inside a fighter jet—which endures intense vibrations, rapid movements, extreme temperature shifts, and has very limited space—is simply beyond current engineering limits.
The restrictions imposed by physics are even more profound.
Quantum systems work best when using very small quantities of photons. However, a military radar designed for long-range detection must emit massive amounts of energy to find targets hundreds of kilometres away.
Scientists describe this as an "energy gap," meaning it is incredibly difficult to maintain delicate quantum states while achieving the range required for combat.
When transmission power is scaled up to useful levels, the specific quantum traits that make the system advantageous start to break down, eliminating its benefits over the vast distances fighter jets operate within.
Managing the signal-to-noise ratio is another massive roadblock. So far, successful tests of quantum illumination have been limited to short distances in highly controlled labs.
Replicating those results in an actual combat zone—where signals face atmospheric degradation, physical clutter, enemy jamming, and fast-moving targets—is a problem that has yet to be solved.
Because of these immense challenges, insiders report that while the DRDO closely tracks global progress in quantum technology—just like leading defence agencies in the US, Europe, and China—quantum radar is treated as a distant scientific goal rather than an imminent battlefield tool.
Conversely, photonic radar has transitioned from a mere concept into tangible hardware. With a domestically built system and a clear path from ground tests to flight trials, India has joined an exclusive club of countries—including the United States, China, and Israel—that are actively developing this practical military technology.
Should the current testing roadmap proceed smoothly, photonic radar is poised to eventually replace today’s AESA systems.
It promises to deliver wider bandwidth, superior accuracy, exceptional resistance to electronic attack, and a much better chance at detecting stealth threats—all without demanding a radical redesign of current combat aircraft.
