Back to Home
Precisometer

Power stability, linewidth, beam quality

MDL-III-450L450 nm blue CW laser

450 nm

The MDL-III-450L is a 450 nm continuous-wave direct diode laser. Electrical current creates optical gain in a semiconductor junction, and the diode generates the laser light directly. Optical feedback selects the oscillating modes, while drive current and junction temperature affect output power and wavelength. The TTL and analog modulation options control different things: TTL gates the beam on and off, while analog control varies its intensity. Modulation bandwidth sets how quickly the source can follow a changing command.

Datasheet (PDF)View MDL-III-L familyBack to CW LasersBrowse all laser models

Specifications

MDL-III-450L

16 specification rows

Output / average power1~500 mW
Beam / notesNear TEM 00, M 2 <1.2
Operating modeCW
Power stability (rms, 4 hours ± 3°C)<2%, <1%, <0.5%
M2<1.5 / <1.2
Beam divergence, full angle (mrad)<1
Warm-up time (minutes)<5
Cooled methodConduction
Operating temperature (°C)10-35
Power supply (100-240VAC)PSU-III-FDA/PSU-III-LED/PSU-A-D/PSU-III-OEM
Expected lifetime (hours)>10000
Central wavelength (nm)450±10
Transverse modeNear TEM00
Polarization ratio>50:1, (>100:1 optional) Horizontal±5 degree (Vertical optional)
Beam height from base plate (mm)24.8
Modulation optionDC-1kHz, 1kHz-10kHz, 10kHz-30kHz, 30kHz-100kHz optional; TTL and Analog optional

What do you need?

Tell us the output power, beam quality and beam delivery you need, and we'll reply with the matching configuration and lead time.

Send your requirementsOpen laser selector

Model selection

Nearby series comparison

Compare MDL-III-450L with the closest available models in the CW Lasers family.

Selection parameterMDL-III-450L (current)MDL-450(FC)FC-450
Wavelength450 nm450 nm450 nm
Optical power / pulse energy1~500 mW1~15 W1~30 W
Operating mode / pulse widthCWCWCW
Beam qualityNear TEM00<1—

Related cw lasers

Compare the MDL-III-450L with nearby cw lasers across the wavelength range.

Choosing a laser

Guides that put this laser in context

Which specifications decide the experiment, and which ones cost money without changing the result.

All guides
Laser emission spectrum, intensity noise traces, and beam quality profiles illustrating the main laser specifications
Photonics
13 min Spec lab

Laser specifications decoded

Linewidth, spectral width, RIN, M², and coherence length answer five different questions. Translate each into the units your experiment is designed in — and learn which ones not to pay for.

Open guide
Low-noise laser head and controller of the type specified for optical trapping
Optical trapping
16 min 2 simulations

Choosing a laser for optical tweezers

Why wavelength is decided by photodamage, focal heating, and detector bandwidth rather than trapping force — and what laser noise costs you in piconewtons.

Open guide
Fluorescently labeled cells in a sharp confocal focal plane
Confocal microscopy
14 min Design lab

Designing a confocal fluorescence excitation system

Connect fluorophores, pinhole size, Airy units, spatial sampling, scan timing, modulation, and power after the fiber in one practical design workflow.

Open guide