Laser source selection

Which laser diode should I choose?Find the right laser source for your application.

905 nm pulsed laser diodes, eye-safe 1535 nm transmitters, fibre-coupled modules and APD receivers - with the parameters, the physics and a route to a quote. Answer six questions and get a ranked shortlist of real parts.

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93catalogue parts

8product families

15wavelengths

110engineering calculators

12engineering articles

LD emitter → collimating optics → obstacle Coaxial return → beam splitter → APD

Laser Selector

Answer six questions. Get a ranked shortlist of real parts with datasheet parameters, the physics behind the ranking, and a route to a quote.

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BEAM COLLIMATION

Comparison of the original spots of the dual lasers with 1200 m collimation

Choose two sources from 905 nm EELs, 1535 nm erbium-glass modules and fibre-coupled modules. Set the available collimation for each source and compare the 1200 m spot using the optical parameters specific to its output type.

Fixed Simulation Distance 1200 m

Laser A

Original Spot / Database Model

Original Light Emitting Area220 × 18 μm

Slow Axis Divergence Angle9°

Fast Axis Divergence Angle6°

View full specification ↗

OPTICAL DATA

Collimating Lens A

Focal Length 120 mm

Effective Aperture 20 mm

SIDE VIEW · SLOW AXISCLEAR

CHIP220 μm · SLOW

Effective Aperture20 mm

Beam at Lens D—

Aperture Capture η—

Diffraction Divergence θ—

D_IN = D₀ + 2f·tan(θ/2) · η_AP = 1 − exp[−2(D_AP/D_IN)²] · θ_OUT = √[(D₀/f)² + (4λ/πD_EFF)²]

Laser B

Original Spot / Database Model

Original Light Emitting Area40 × 18 μm

Slow Axis Divergence Angle9°

Fast Axis Divergence Angle25°

View full specification ↗

OPTICAL DATA

Collimating Lens B

Focal Length 30 mm

Effective Aperture 6 mm

SIDE VIEW · SLOW AXISCLEAR

CHIP40 μm · SLOW

Effective Aperture6 mm

Beam at Lens D—

Aperture Capture η—

Diffraction Divergence θ—

D_IN = D₀ + 2f·tan(θ/2) · η_AP = 1 − exp[−2(D_AP/D_IN)²] · θ_OUT = √[(D₀/f)² + (4λ/πD_EFF)²]

Waiting for both lasers to calculate...

A—

PEAK PULSE POWER—

PULSE ENERGY—

—

Original Spot · Slow Axis—

Original Spot · Fast Axis—

Collimated Spot · Slow Axis—

Collimated Spot · Fast Axis—

Slow Axis After Collimation—

Fast Axis After Collimation—

Slow shaft compression—

Fast shaft compression—

B—

PEAK PULSE POWER—

PULSE ENERGY—

—

Original Spot · Slow Axis—

Original Spot · Fast Axis—

Collimated Spot · Slow Axis—

Collimated Spot · Fast Axis—

Slow Axis After Collimation—

Fast Axis After Collimation—

Slow shaft compression—

Fast shaft compression—

1200 m Simulated Spot Variation

Original and collimated spots displayed on the same logarithmic scale

A · RAW—

A · COLLIMATED—

B · RAW—

B · COLLIMATED—

Calculate the typical luminous area and FWHM divergence angle using the database, and make a simplified estimate according to the Gaussian beam far field and diffraction limit. The simulated spot uses a logarithmic scale, making it easier to observe both meter-scale original spots and sub-meter collimated spots; actual results still require full system testing.

Platform

Five layers, one route to a part

Selector, calculators and knowledge all point at the same laser database, and the database ends in a conversation with a supplier.

01 Selector

Laser Selector

Six questions - application, wavelength, mode, energy, range and package - return a ranked shortlist with the physics shown.

Start selecting

02 Calculators

Calculators

110 engineering calculators ported from our WeChat mini-program: pulse energy, LiDAR link budget, APD gain, SPAD timing, fibre coupling, coatings and more.

Open the calculators

03 Knowledge