Make Every Photon Count

Make Every Photon Count

Highest transmission and extinction with TOPTICA isolators at all wavelengths.

TOPTICA isolators ensure stability of TOPTICA’s narrow linewidth, long coherence length lasers, and they can protect Watt-class lasers and amplifiers from damaging back reflections. TOPTICA can also offer custom form factors and wavelengths.

For more than twenty years, TOPTICA has offered narrow linewidth, single frequency, external cavity diode lasers. The spectrum and power of these lasers can be extremely sensitive to reflections from downstream optics, so it is critical that no light returns to the laser cavity. These stringent demands drove TOPTICA to develop its own line of single-stage (>35 dB) and double-stage (>60 dB) optical isolators.

Key Applications:

  • Protecting single-frequency lasers from instabilities caused by optical feedback.
  • Protecting high power fiber lasers and amplifiers from damage due to back reflection.
  • Injection locking of laser diodes.
  • Faraday rotation.

Key Features

  • Highest transmission & extinction from the UV to NIR.
  • Custom wavelengths and form factors available, as small as < 1 cm3.

TOPTICA isolators are critical components that ensure long-term stability and performance in our narrow-linewidth, long coherence length lasers.


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Dual-Stage Isolators

Tunable Two-Stage Performance

  • Designed and manufactured by the laser experts of TOPTICA
  • High power damage threshold (4 kW/cm2)
  • Highest guaranteed isolation in industry, high transmission
  • Center wavelength coverage encompasses 640 - 1100 nm
  • All internal components angled 1° to eliminate back reflection

TOPTICA’s product line of Dual-Stage Isolators are specially designed and manufactured in-house by the laser experts of TOPTICA to give industry leading performance in dual stage configurations. Dual stage models provide at least 60 dB isolation and 80 % transmission (> 67 dB and > 90 % average) over individual wavelength ranges in total spanning 640 - 1100 nm.


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Single-Stage Isolators

Tunable Single Stage Performance

  • Designed and manufactured by the laser experts of TOPTICA
  • High power damage threshold (4 kW/cm2)
  • Highest guaranteed isolation in industry, high transmission
  • Center wavelength coverage encompasses 395 - 425 nm and 630 - 1400 nm
  • All internal components angled 1° to eliminate back reflection

TOPTICA’s product line of Single-Stage Isolators are specially designed and manufactured in-house by the laser experts of TOPTICA to give industry leading performance in single stage configurations. Single stage devices provide at least 35 dB isolation and 85% transmission (> 43 dB and > 92% average) over individual wavelength ranges in total spanning 392.5 - 427.5 nm and 630-1400 nm.


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Single-Stage Mini Isolators

Low SWaP for High Integration or Field Deployment

  • Small package < 1 cm³
  • High guaranteed isolation, high transmission
  • Wavelengths for key quantum applications
  • Designed and manufactured by the laser experts of TOPTICA

TOPTICA’s Single-Stage Mini Isolators reliably provide high transmission and isolation but in a small form factor (< 1 cm3). This reduced size allows many lasers and isolators to be integrated into small systems. Additionally, these isolators are resilient with respect to environmental temperature changes. Together with their small size and excellent optical performance, these mini-isolators are ideal for field-deployed quantum technologies.

Mini-isolators are available at key wavelengths relevant to quantum technology applications, and many more visible and near-infrared wavelengths are available on request, as are custom form factors.


Kudos to TOPTICA Photonics for delivering such high-performance isolators that ensure the stability and efficiency of narrow-linewidth and long-coherence lasers. The precision and reliability of your products are critical for demanding applications, and it's great to see how TOPTICA continues to lead in providing solutions for safeguarding laser systems. At SinoGaN, we share a similar commitment to precision and performance in the semiconductor industry. We specialize in providing GaN epitaxial wafers and AlN templates in a variety of sizes and specifications, tailored for power and RF applications. Our 8-inch Si-substrate power GaN epitaxial wafers and 6-inch Si-substrate RF GaN epitaxial wafers are ideal for supporting high-power and high-frequency applications, including those used in laser systems, communications, and automotive electronics. We’re excited to help drive the next generation of semiconductor technologies with our high-quality materials, and we look forward to further collaboration opportunities with industry leaders like TOPTICA.

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