5276_ftosa_6
7407_osa201_sgl
osa_201_app_800
7408_osa202_sgl
osa_202_app_800
7409_osa203_sgl
osa_203_app_800
osa_backside_780_tab
7410_osa205_2_sgl
osa205_revised_closeup_door_open2_800
osa205_revised_closeup_door_open_800
osa205_revised_app_800

Optical Spectrum Analyzers

PrintEmail

Optical Spectrum Analyzers




  • Dual-Function Broadband Spectrometer and Wavelength Meter
  • Spectral Range: 350-1100 nm, 600-1700nm, 1000-2500nm, or 1000-5600nm
  • Includes Laptop with pre-Installed software for Data Collection and Analysis

Features

  • Based on a Michelson Interferometer
  • View Fourier-Transformed Spectrum or Raw Interferogram in Real Time
  • Four Models Available: 350 - 1100 nm, 600 - 1700 nm, 1000 - 2500 nm, and 1000 - 5600 nm
  • Spectral Resolution: 7.5 GHz (0.25 cm-1)
  • Includes Windows® Laptop with Pre-Installed Software
    • Flat, Intuitive Interface with Tooltips for All Functions
    • Quickly Perform Math Operations, Apodize, Convert Units, and More
    • Routine Libraries for LabVIEW and Common Programming Languages
  • Standalone "Virtual Device" Software Demo Available (See the Software Tab)

Thorlabs' Optical Spectrum Analyzers (OSAs) are general-purpose instruments that measure the optical power of a light source as a function of wavelength. Compact, accurate, and precise, these instruments are versatile enough to analyze the spectrum of a broadband telecom signal, resolve the Fabry-Perot modes of a gain chip, or measure the coherence length of a tunable external cavity laser.

Many commonly available OSAs use grating-based monochromators and suffer from slow acquisition times due to the need to mechanically scan the grating and average out noise at each wavelength. Thorlabs' OSAs acquire the spectrum via a Fourier transform, using a scanning Michelson interferometer in a push/pull configuration, as explained in the Design tab and shown in the video below. This approach dramatically improves the acquisition time, provides a full-featured OSA, and enables a high-precision wavelength meter mode with 1 part-per-million accuracy (i.e., 7 significant figures).

Thorlabs' OSAs accept FC/PC-connectorized optical fibers. Single mode and step-index multimode fibers with cores up to Ø50 µm can be used. In addition, the OSA205 can directly accept a collimated free-space input. Special designs with other fiber input receptacles are available upon request. The instruments are designed to measure CW light sources but also work in some applications where a pulsed light source is used. Please contact Technical Support to discuss custom fiber connectors and pulsed light source applications.

To reduce the presence of water absorption lines in the mid-IR region of the spectrum, the OSA203 and OSA205 feature two 1/4" ID quick-connect hose connections on the back panel, through which the interferometer can be purged with dry air or nitrogen. Thorlabs' Pure Air Circulator Unit is ideal for this task.

 

 Key Specificationsa
Item # OSA201 OSA202 OSA203 OSA205
Wavelength Range 350 - 1100 nm 600 - 1700 nm 1000 - 2500 nm
(10000 - 4000 cm-1)
1000 - 5600 nm
(10000 - 1786 cm-1)
Spectral Resolutionb 7.5 GHz (0.25 cm-1)
See the Design Tab for Details
Spectral Accuracy ±2 ppmc
Spectral Precision 1 ppmc
Wavelength Meter Resolution 0.1 ppmc
Wavelength Meter Accuracy 1 ppmc
Wavelength Meter Precision 0.2 ppmc

 

  • Spectral Resolution is defined according to the Rayleigh criterion.
  • Specified in parts per million, which corresponds to nearly 7 significant figures (depending on the specification). For instance, if the wavelength being measured is 1 µm, the wavelength precision will be 0.2 pm, or 200 fm.

 

Optical Spectrum Analyzer for 350 - 1100 nm

 

  • Wavelength Range: 350 - 1100 nm
  • Fiber-Coupled Input with FC/PC Connector
  • Includes Windows® Laptop with Thorlabs' OSA Software Pre-Installed and All Needed Accessories
  • Noise Floor in Power Density Mode: -60 dBm/nm (See Design Tab for Details)

 

Optimized for use in the 350 - 1100 nm spectral range, the OSA201 measures the optical power of both narrowband and broadband sources as a function of wavelength. This spectral range includes many important fluorophores in the life sciences. The maximum spectral resolution of 7.5 GHz (0.25 cm-1) is set by the maximum optical path length difference of ±4 cm, as explained in the Design tab, while the high spectral accuracy of ±2 ppm (parts per million) is ensured by simultaneously measuring the interferogram of a stabilized 632.991 nm HeNe laser.

Fiber-Coupled Input
The OSA201's input port is compatible with single mode and step-index multimode FC/PC patch cables with cores up to Ø50 µm. Custom designs with other fiber input receptacles are available upon request; please contact Tech Support for details. For the highest contrast, single mode patch cables are recommended.

 

Optical Spectrum Analyzer for 600 - 1700 nm

 

  • Wavelength Range: 600 - 1700 nm
  • Fiber-Coupled Input with FC/PC Connector
  • Includes Windows® Laptop with Thorlabs' OSA Software Pre-Installed and All Needed Accessories
  • Noise Floor in Power Density Mode: -70 dBm/nm (See Design Tab for Details)

 

Optimized for use in the 600 - 1700 nm spectral range, the OSA202 measures the optical power of both narrowband and broadband sources as a function of wavelength. This spectral range includes the C-band (1530 - 1565 nm), L-band (1565 - 1625 nm), and other important telecom transmission windows. The maximum spectral resolution of 7.5 GHz (0.25 cm-1) is set by the maximum optical path length difference of ±4 cm, as explained in the Design tab, while the high spectral accuracy of ±2 ppm (parts per million) is ensured by simultaneously measuring the interferogram of a stabilized 632.991 nm HeNe laser.

Fiber-Coupled Input
The OSA202's input port is compatible with single mode and step-index multimode FC/PC patch cables with cores up to Ø50 µm. Custom designs with other fiber input receptacles are available upon request; please contact Tech Support for details. For the highest contrast, single mode patch cables are recommended.

 

Optical Spectrum Analyzer for 1000 - 2500 nm

 

  • Wavelength Range: 1000 - 2500 nm (10000 - 4000 cm-1)
  • Fiber-Coupled Input with FC/PC Connector
  • Includes Windows® Laptop with Thorlabs' OSA Software Pre-Installed and All Needed Accessories
  • Noise Floor in Power Density Mode: -65 dBm/nm (See Design Tab for Details)
  • Two Built-In Hose Connections for Optional Purging

Optimized for use in the 1000 - 2500 nm spectral range, the OSA203 measures the optical power of both narrowband and broadband sources as a function of wavelength. This spectral range includes molecular absorption bands for carbon monoxide, ammonia, and other compounds, as well as important telecom transmission windows. The maximum spectral resolution of 7.5 GHz (0.25 cm-1) is set by the maximum optical path length difference of ±4 cm, as explained in the Design tab, while the high spectral accuracy of ±2 ppm (parts per million) is ensured by simultaneously measuring the interferogram of a stabilized 632.991 nm HeNe laser.

Fiber-Coupled Input
The OSA203's input port is compatible with single mode and step-index multimode FC/PC patch cables with cores up to Ø50 µm. Custom designs with other fiber input receptacles are available upon request; please contact Tech Support for details. For the highest contrast, single mode patch cables are recommended. To adapt a free-space input to the OSA203, please consider the procedures illustrated in the Free-Space Coupling tab above.

Hose Connections for Purging
None of the optics in the OSA203 are made from hygroscopic materials, so purging to prevent water-induced degradation of the cavity is not necessary. Nevertheless, measurements in the mid-IR spectral range can be extremely sensitive to the presence of water vapor, which absorbs at wavelengths that may overlap with the spectrum being measured. To help remove water absorption lines, the rear of the OSA203 contains a pair of 1/4" ID quick-connect hose connections (one for supply and one for return). By circulating a continuous flow of dry air or nitrogen through these connections, the optical cavity will remain dry. Thorlabs' Pure Air Circulator Unit, which uses hosing that can be directly inserted into these connectors, is ideal for this task.

 

Optical Spectrum Analyzer for 1000 - 5600 nm

 

  • Wavelength Range: 1000 - 5600 nm (10000 - 1786 cm-1)
  • Two Optical Input Ports
    • Fiber-Coupled Input with FC/PC Connector
    • Free-Space Input with Red Alignment Beam and 4-40 Taps for 30 mm Cage Compatibility
  • Includes Windows® Laptop with Thorlabs' OSA Software Pre-Installed and All Needed Accessories
  • Noise Floor in Power Density Mode: -40 dBm/nm (See Design Tab for Details)
  • Two Built-In Hose Connections for Optional Purging

Optimized for use in the 1000 - 5600 nm spectral range, the OSA205 measures the optical power of both narrowband and broadband sources as a function of wavelength. This OSA is fully compatible with our fluoride optical fiber and fiber patch cables and many of our quantum cascade and interband cascade lasers, and its broad wavelength range overlaps with that of many FTIR spectrometers. The maximum spectral resolution of 7.5 GHz (0.25 cm-1) is set by the maximum optical path length difference of ±4 cm, as explained in the Design tab, while the high spectral accuracy of ±2 ppm (parts per million) is ensured by simultaneously measuring the interferogram of a stabilized 632.991 nm HeNe laser.

Fiber-Coupled and Free-Space Inputs
The OSA205 directly accepts fiber-coupled or free-space optical inputs. The fiber-coupled input is compatible with single mode and step-index multimode FC/PC patch cables with cores up to Ø50 µm. For the highest contrast, single mode patch cables are recommended. The free-space input (illustrated at 2:54 in the video above) accepts collimated input beams and has a Ø6 mm mechanical aperture. When the free-space door is open, a red alignment beam is emitted that should be made collinear and antiparallel to the unknown input. Four 4-40 taps around the free-space input provide compatibility with our 30 mm cage systems; use cage rods no shorter than 1.5" to prevent attached cage components from clashing with the door.

Hose Connections for Purging
None of the optics in the OSA205 are made from hygroscopic materials, so purging to prevent water-induced degradation of the cavity is not necessary. Nevertheless, measurements in the mid-IR spectral range can be extremely sensitive to the presence of water vapor, which absorbs at wavelengths that may overlap with the spectrum being measured. To help remove water absorption lines, the rear of the OSA205 contains a pair of 1/4" ID quick-connect hose connectors (one for supply and one for return). By circulating a continuous flow of dry air or nitrogen through these connections, the optical cavity will remain dry. Thorlabs' Pure Air Circulator Unit, which uses hosing that can be directly inserted into these connectors, is ideal for this task.

ABOUT US

Our Mission is to accelerate the advancement of optical technology for precision measurements and their applications from the table tops of research laboratories to standard use in communication and high technology industries. Our aim is to serve our customers. Our hope is to create a place for highly skilled people in an open environment

contact us

Tel               +966 35823441
Fax               +966 35823441
Egypt Mobile  +2 0120 7577664
KSA Mobile     +966 545 991188
Email             This email address is being protected from spambots. You need JavaScript enabled to view it.

newsletter