Additional Isolators
Laser feedback protection
• Efficient feedback protection for diode lasers • Wide wavelength range available: UV to IR
• Faraday rotator plus high-quality polarization optics • Single-stage models: > 30 dB, 390 .. 2300 nm
• Double-stage models: > 60 dB, 405 .. 1585 nm
An optical isolator transmits light in one direction only, by rotating the polarization axis of linearly polarized light. This is achieved by means of a crystal placed within a magnetic field (Faraday effect). The isolator thus prevents unwanted feedback into the laser source, which would else affect the laser’s coherence, or even damage the diode itself. TOPTICA offers single-stage and double-stage models for a wide wavelength range.
Options
• Single-stage models: isolation > 30 dB typ. • Double-stage models: isolation > 60 dB typ. • Aperture 3 / 4 / 5 mm (model dependent)
• Tunable and fixed-wavelength versions • Fine-tuning to application wavelength on request
Applications
• Eliminate feedback instabilities in ECDLs • Reduce back reflections from fiber coupling
• Stabilize injection locking • Eliminate feedback-induced damage
Specifications
Single-stage isolators Double-stage isolators Wavelength range *
390 .. 2300 nm
405 nm, 640 .. 1585 nm
Typical extinction ratio
30 .. 35 dB
> 60 dB
Typical transmission
85 .. 90 %
> 80 %
Aperture *
3 .. 5 mm
3 .. 5 mm
Application
Coupling into FC/APC fibers, resonator alignment
(e.g. FPI 100)Coupling into PC fibers or fiber-optic splitters,
fiber coupling of high-power lasers* Spectral range with gaps, model dependent.
The footprint of an optical isolator depends on the wavelength, the number of Faraday rotator stages (single-stage or double-stage), and the aperture. Please contact us for details.
Additional Information
Extinction curve of a single-stage isolator at 780 nm. The maximum extinction is -40 dB. The arrow indicates a range of approx. 25 nm, where the extinction is < -30 dB.
商品属性 [波长] 390 .. 2300 nm/405 nm, 640 .. 1585 nm