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Precisometer

Power stability, linewidth, beam quality

MLL-III-976-SM976 nm near-infrared CW laser

976 nm

The MLL-III-976-SM is a 976 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. The specified fiber connection delivers the generated light to the experiment; its core size, numerical aperture and connector need to match the receiving optics.

Datasheet (PDF)View MLL-III-SM familyBack to CW LasersBrowse all laser models

Specifications

MLL-III-976-SM

19 specification rows

Wavelength976 nm
Output / average power1~1000 mW
Beam / notesSM Fiber output laser
Power stability (rms, 4 hours ± 3°C)<2%, <1%, <0.5%
Fiber typeSM fiber, PM fiber optional
Fiber Core diameter4-9μm, 0.12NA
Fiber connectorFC/PC, FC/APC optional
Fiber jacketMetal, PVC optional
Power supply (100-240VAC)PSU-III-FDA/PSU-III-LED/PSU-A-D/PSU-III-OEM
Modulation optionDC-1kHz, 1kHz-10kHz, 10kHz-30kHz, 30kHz-100kHz optional; TTL and Analog optional
Operating modeCW
Noise of amplitude (rms, 20Hz-20MHz)<1%, <0.5%
Fiber length1m
Transverse modeTEM00
Ellipticity>0.95
M2 after fiber~1.1
Warm-up time (minutes)<5
Cooled methodConduction
Operating temperature (°C)10-35
Expected lifetime (hours)>10000

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Model selection

Nearby series comparison

Compare MLL-III-976-SM with the closest available models in the CW Lasers family.

Selection parameterMLL-III-976-SM (current)MDL-976(FC)FC-976
Wavelength976 nm976 nm976 nm
Optical power / pulse energy1~1000 mW1 mW~2 W1~30 W
Operating mode / pulse widthCWCWCW
Beam qualityTEM00Multimode—

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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