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Home > Applications > Light/Laser/LED > Laser Characterization

Laser Characterization

Laser Measurement

Ocean Optics offers high-resolution, small-footprint spectrometers and accessories that are ideal for laser characterization measurements such as determination of tunable laser wavelength, laser bandwidth and laser line width. Applications include laser-induced fluorescence measurements, laser absorption spectroscopy and cavity ring-down spectroscopy.

Our modular spectrometers can be configured for sub-nanometer optical resolution (FWHM) in the UV-VIS (200-1100 nm) and high resolution in the NIR (800-2500 nm), with fast response times and triggering functions for synchronizing laser events to spectral acquisition. Standard and high-volume OEM options are possible.


Featured:

NIRQuest

High-Resolution Near-IR Analysis

NIRQuest for near-IR laser characterization and more.

Example Setup: HR4000 Spectrometer

Overview

The HR4000 High-resolution Spectrometer is ideal for measuring the spectral characteristics and intensity of continuous-wave and pulsed lasers. For high-power lasers, an integrating sphere or cosine corrector attenuates the light to avoid saturating the CCD detector array. OceanView software captures peak parameters and other spectral information.

Spectrometer

The HR4000 Spectrometer uses our “HR” Optical Bench, which is designed to yield high optical resolution in a compact optical bench, making it suitable for resolving fine spectral features.

For laser characterization, we recommend a grating with a high groove density. A good option is the H6 1200 mm-1 grating set to a 750-925 nm wavelength range, complemented in the optical bench with a 5 µm slit as the entrance aperture. This configuration provides ~0.12 nm resolution (FWHM). For better resolution consider an 1800 mm-1 or 2400 mm-1 grating.

Additional spectrometer options for high-resolution measurements include the HR2000+, which has slightly faster integration time than the HR4000; and the STS microspectrometer, a very small-footprint but highly reproducible unit that is excellent for large-volume customization projects.

Sampling Optics

There are several possible sampling setups for your laser measurement: a CC-3-UV cosine corrector with an optical fiber; the FOIS-1 integrating sphere with a fiber; or fiber assembly coupled to the laser. Optical posts hold the optical fixtures in place.

Laser Analysis System Components

HR4000 high-resolution spectrometer We recommend configuring the spectrometer with Grating #6 set for 750-925 nm, with a 5 µm slit as the entrance aperture
FOIS-1 Fiber optic integrating sphere for collecting the signal
OPM series Optical Post Mounts Optical post mounts (multiple options available) for holding the integrating sphere and other components
QP400-2-VIS-NIR Premium-grade patch cord assembly, 2 m length, 400 µm diameter
OceanView Spectrometer operating software

Example Setup 1 - Laser Characterization

Example Setup: NIR Laser Analysis

Overview

NIRQuest series spectrometers are ideal for measuring the spectral characteristics and intensity of continuous-wave and pulsed lasers. For high-power lasers, an integrating sphere or cosine corrector attenuates the light to avoid saturating the detector array. OceanView software captures peak parameters and other spectral information.

Spectrometer

The NIRQuest256-2.5 is a 256-element InGasAs-array spectrometer with response from ~900-2500 nm. When configured with Grating NIR10 (300 mm-1 grating with 1200 nm blaze wavelength) and a 10 µm slit, the system will provide optical resolution performance of <2.0 nm (FWHM). Your spectral range will be somewhat narrower than with a standard NIRQuest setup, although for laser measurements that should not be a major concern.

Also, if your laser wavelength of interest is in the shortwave NIR range of ~800-1100 nm, our HR series high-resolution linear CCD array spectrometers are a good option.

Sampling Optics

There are several possible sampling setups for your laser measurement: a CC-3-UV cosine corrector with an optical fiber; the FOIS-1 integrating sphere with a fiber; or fiber assembly coupled to the laser. Optical posts hold the optical fixtures in place.

Laser Analysis System Components

NIRQuest256-2.5 We recommend configuring the spectrometer with Grating NIR10 set for your wavelength range of interest, with a 10 µm slit as the entrance aperture.
FOIS-1 Fiber optic integrating sphere for collecting the signal
OPM series Optical Post Mounts Optical post mounts (multiple options available) for holding the integrating sphere and other components
QP400-2-VIS-NIR Premium-grade patch cord assembly, 2 m length, 400 µm diameter. An alternative fiber option is fluoride, which has better response at higher wavelengths.
OceanView Spectrometer operating software

Example Setup 2 - Laser Characterization

High-resolution near-IR spectrum of thulium laser measured with a NIRQuest spectrometer.

Spectrum - Thulium Laser 1

High-resolution near-IR spectrum of thulium laser measured with a NIRQuest spectrometer.

Spectrum - Thulium Laser 2

Laser Characterization Laser Characterization Laser Characterization Laser Characterization
Flame Spectrometer

Flame Spectrometer

High Thermal Stability, Interchangeable Slits
Spark-VIS

Spark-VIS

Ultra-compact Visible Spectral Sensor
Flame-NIR Spectrometer

Flame-NIR Spectrometer

Compact NIR Instrument
STS Developers Kit

STS Developers Kit

Connect, Code, Create with New Sensing Tools
QE Pro (Custom)

QE Pro (Custom)

High-sensitivity Spectrometer for Low Light Level Applications
Maya2000 Pro (Custom)

Maya2000 Pro (Custom)

High Sensitivity Spectrometer
STS-UV

STS-UV

UV Spectral Analysis in a Tiny Footprint
HR4000 (Custom)

HR4000 (Custom)

High Resolution Spectrometer for Maximum Flexibility
STS-VIS

STS-VIS

Vis Spectral Analysis in a Tiny Footprint
HR2000+ (Custom)

HR2000+ (Custom)

Custom High Resolution Spectrometer for Maximum Flexibility
QE Pro-ABS

QE Pro-ABS

High-sensitivity Spectrometer for Absorbance
STS-NIR

STS-NIR

NIR Spectral Analysis in a Tiny Footprint
HR4000CG-UV-NIR

HR4000CG-UV-NIR

High Resolution Spectrometer for Laser Characterization
QE Pro-FL

QE Pro-FL

High-sensitivity Spectrometer for Fluorescence
HR2000+ES

HR2000+ES

High Resolution Spectrometer with Enhanced Sensitivity