- 레이저 시스템 | Laser System > Tunable (swept) Laser
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Benchtop Wavelength-Swept Tunable Semiconductor Lasers |
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Product Info
Technical Overview
The Broadsweepers series is a new family of tunable semiconductor lasers intended for applications that require fast and precision wavelength tuning with high sweep-to-sweep reproducibility of the "instantaneous" wavelength. Among all possible applications, the most important are Optical Coherence Tomography (including Full Field OCT), biomedical imaging, interferometry, optical spectroscopy, fiber-optic sensing and optical component characterization.
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The optical scheme of the Broadsweeper is based on an external fiber-optic ring cavity and a broadband Semiconductor Optical Amplifier (SOA), working as a gain medium. The wide bandwidth of the SOA modules used, and their high fiber-to-fiber gain allow wavelength tuning range of more than
The wavelength tuning technique involves the use of a specially developed narrowband Acousto-Optical Tunable Filter (AOTF). The AOTF is actively thermally stabilized for high spectral stability of laser radiation. High wavelength accuracy and excellent wavelength reproducibility in sweep operation are ensured by "akinetic" cavity design with no moving components inside. Due to the perfect AOTF tuning characteristic, the laser provides
All other components comprising AOTF unit and laser cavity feature a unique customized design perfectly fitted for broadband spectral applications. Aberration-free aspherical lenses are used for maximizing the coupling efficiency to optical fibers and minimizing the insertion losses of AOTF unit over entire wavelength tuning range. The filter and its optics are packaged into one monolithic metal housing, thereby ensuring reliable day-to-day operation without misalignment.
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The external cavity of the laser uses a PANDA-type polarization maintaining (PM) fiber. This ensures a well-defined state of light polarization and its high stability in time and over the tuning range. Most of fiber-optic components are built by using the fast-axis-blocking technology that also guarantees high values of the PER
The driving electronics ensures precise, reliable and safe control of the instrument in all modes of operation. It provides all the necessary laser diode protective measures such as on-off transients' suppression, over-temperature protection, open-circuit protection and laser current limitation by a pre-set safe value. Specially developed fast optical power control loop enables a flat-top-shaped tuning characteristic at all specified sweep speeds for all models offered.
The laser provides the following modes of operation:
- CW operation at any single wavelength within the full tuning range. The operating wavelength is adjustable from the front panel or from a computer. Under computer control, typical switching between two different wavelengths is done in less than
100 ms. The user can select any wavelength within the full wavelength range with a50-pm resolution. - Continuous sweeps over the full tuning range or over the band of interest (within the full tuning range) not shorter than
5 nm. Both the internal triggering and the external triggering are available. - Continuous switching between two any wavelengths within the full tuning range at a certain repetition frequency. The range of frequencies includes 13 factory-set values. Customized settings for the repetition frequency are possible upon request.
When internally triggered, the device produces synchronizing pulses. In the external triggering mode, the device responds to incoming TTL-compatible trigger signals. BNC connectors for triggering/synchronization are located on the back panel.
The output optical power of the Broadsweepers without internal boosters is
The optical output is provided through the front-panel narrow key
Remote Control Capability
The device has an
Laser Safety Measures
To fulfill the requirements of ICE 60825-1 Ed. 3 2014-05, each instrument is equipped with laser safety measures including: the master key control, remote interlock connection, visual/audible alarm, informational warning stickers, etc.
Informational labels about laser hazard meet the requirements of ICE |
Standard Models Available for Ordering
Depending on the spectral band and sweep speed, there are several models of the product to choose. Refer to the table below for the standard versions of the product.
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* INCLUDES INTERNAL OPTICAL POWER BOOSTER |
General Specifications
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* FOR MODELS WITH INTERNAL OPTICAL POWER BOOSTER |
Product Customization Capabilities
Superlum offers product customization services. A number of the operating characteristics of the product (e.g. the output power level, target wavelengths for the tuning range, the sweep speed limits, etc.) are available for modification according to your requirements.