In time-of-flight ranging, distance resolution is fundamentally limited by how precisely the system can time the returning pulse — and that precision is set largely by the pulse duration itself. A shorter pulse gives a sharper timing edge to measure against, directly translating into finer range resolution and better discrimination between closely spaced targets.
Peak power matters just as much: at range, only a small fraction of the emitted light returns to the detector, so higher peak power improves signal-to-noise ratio and extends usable range. And because ranging systems often operate outdoors or in the field, beam quality and long-term stability determine whether that performance holds up over distance, over time, and across environmental conditions — not just on the bench.
Picosecond Lasers for High-Precision Ranging and Sensing
Precision ranging and sensing systems — from LIDAR and range-finders to laser altimetry and metrology — depend on the excitation laser to set the ultimate limit on resolution, range, and reliability. Pulse duration, peak power, beam quality, and long-term stability all directly determine how well a system can resolve distance and detect weak return signals.
This page focuses on Picophotonics' high-precision 532 nm picosecond platform — the wavelength band where our sub-100 ps pulses, narrow single-frequency spectrum, and kilowatt-level peak powers deliver the tightest range resolution and cleanest returns.
Why picosecond pulses improve range precision
Satellite Laser Ranging (SLR)
Satellite Laser Ranging is a specialized, particularly demanding form of LIDAR: ground stations fire short laser pulses at retroreflectors on orbiting satellites and measure the round-trip time of flight to determine range with millimeter-to-centimeter precision.
SLR stations worldwide have converged on a consistent set of laser requirements — 532 nm output, pulse durations roughly in the 10‑200 ps range, and a narrow, stable linewidth that lets receivers use tight bandpass filters to reject solar background and enable daytime tracking.
This is squarely the parameter space our 532 nm, sub-100 ps platform is built for.
Modern SLR development is also trending toward higher repetition rates and lower pulse energies per shot — and this is where our platform stands out: most current SLR stations operate at repetition rates from a few Hz up to around 2 kHz, with next-generation systems targeting the low kHz range.
Our CP32 and SP05 platforms are tunable up to 100–200 kHz — roughly two orders of magnitude beyond today's typical station rates — enabling far higher shot rates, faster statistical convergence on a range measurement, and denser data acquisition per satellite pass.
Full-scale, long-range operational SLR to distant satellites typically calls for higher pulse energies than our standard catalog units — talk to us about a custom configuration if that's your application.
What a high-precision ranging system needs from its laser
Meeting the resolution, range, and reliability requirements of modern ranging systems means the laser has to deliver on several fronts simultaneously:
Short pulse duration & narrow linewidth
Sub-100 ps pulses sharpen the timing edge used for distance measurement, while a narrow, single-frequency spectrum (< 0.06 nm) supports coherent and wavelength-sensitive ranging techniques.
High peak power
Kilowatt-level peak power improves signal-to-noise ratio for weak returns, extending usable range and improving detection reliability against background light and clutter.
High repetition rate
Tunable up to 100–200 kHz — well beyond the few-kHz rates typical of comparable ranging systems — enabling faster statistical convergence per measurement and denser point-acquisition rates for time-critical applications.
Beam quality
Diffraction-limited beam quality (M² ≤ 1.3) keeps the beam tightly focused over distance, supporting long-range propagation and fine spatial resolution at the target.
Long-term reliability
Operational lifetimes exceeding 10,000 hours and stable, alignment-free operation matter for field and airborne deployment, where service access is limited and downtime is costly.
Meeting all of these simultaneously — short pulses, high peak power, tight beam quality, and field-grade reliability — is exactly the engineering problem our SESAM-based microchip platform was built to solve.
Bathymetric and dual-wavelength LiDAR
Airborne and shallow-water bathymetric LiDAR is a natural fit for synchronized dual-wavelength output: the 1064 nm channel returns from the water surface while the 532 nm channel penetrates the water column to the bed, and the fixed timing relationship between the two lets a system separate surface and bottom returns cleanly. Our CP2L delivers both wavelengths from a single timing-matched source, with pulse energy configurable to several µJ per channel for extended depth and range.
Picophotonics lasers for high-precision ranging
Picophotonics' picosecond microchip lasers are built around proprietary SESAM-based passive Q-switching — generating highly stable, single-frequency picosecond pulses from a compact, monolithic microchip architecture, without the cost or complexity of a mode-locked laser system.
Learn more about our technology
For high-precision 532 nm ranging, two platforms cover the range most instrument builders need:
CP32 — 532 nm high energy picosecond laser
Single-frequency operation with sub-100 ps pulse durations and pulse energy up to several µJ, giving longer working distances and higher return signal levels for demanding ranging applications.
CP32 Product PageCP2L — Dual-wavelength picosecond laser
Synchronized 532 nm and 1064 nm output for differential or multi-wavelength ranging techniques, where a second, timing-matched wavelength cancels common-mode noise or provides a reference channel.
CP2L Product PageTime-resolved Raman spectroscopy Nonlinear and Quantum Photonics
Talk to us about your ranging application
Every ranging system has its own constraints — target range, required resolution, ambient light conditions, and integration footprint all shape which laser platform fits best. Our team can help you match pulse duration, energy, and form factor to your application, or scope a custom configuration if the standard platforms don't quite fit.
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