Next generation FDML Laser


320 NG FDML buffered

Optores introduces the worlds first swept laser source with a sweep rate of up to 3 MHz for research applications. The Optores swept source is based on all-fiber Fourier-domain mode-locked (FDML) laser technology. Designed for record speed, the Optores swept laser also features long coherence lengths and very high output powers beyond 100 mW. Three configuration variants are available to match your requirements. All variants are available at either 1060 nm, 1310 nm or 1550 nm center wavelength.

  MHz FDML datasheet

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Unique features

MHz sweep rate
Optores offers three variants with speeds up to 3 MHz
Long coherence
Less than 3 dB PSF decay up to full image range (1.5 GHz fringe frequency)
Massive output power
More than 100 mW of output power make sure you have enough signal even for the most demanding applications
Large tuning range
>110 nm around 1315 nm for high resolution (larger range available on request)
FDML technology
Self starting laser with MHz-OCT proven technology
Sweep trigger output and user programmable IO (TTL) channels for all your synchronization needs
Remote control
Ethernet-based remote control with SCPI and LabVIEW support
Made for research
Full control over the laser parameters and synchronization signals


Optores swept lasers are ideally suited for optical coherence tomography (OCT) applications at MHz speeds, such as
Video-rate 3D OCT
Process monitoring
Apart from OCT, FDML lasers can also be used for other imaging applications such as Raman micro-spectroscopy
FDML lasers have been successfully used for high-speed combustion monitoring and other spectroscopy applications
Optical sensing
Rapid monitoring of fiber-Bragg sensors benefits from MHzspeeds provided by Optores
Optical testing
Swept lasers are also suited to perform chromatic dispersion measurements of km-long fiber spools
Apart from OCT, FDML lasers also speed up other interferometry techniques, such as master-slave interferometry


Optores FDML products are used by leading research groups, and have been featured in the following peer-reviewed publications (incomplete, not frequently updated):


  • Mehdi Azimipour, Denise Valente, Kari V. Vienola, John S. Werner, Robert J. Zawadzki, and Ravi S. Jonnal: Optoretinogram: optical measurement of human cone and rod photoreceptor responses to light. Optics Letters Vol. 45, Issue 17, pp. 4658-4661 (2020)
  • Justin V. Migacz, Iwona Gorczynska, Mehdi Azimipour, Ravi Jonnal, Robert J. Zawadzki, and John S. Werner: Megahertz-rate optical coherence tomography angiography improves the contrast of the choriocapillaris and choroid in human retinal imaging. Biomedical Optics Express Vol. 10, Issue 1, pp. 50-65 (2019)
  • Raju Poddar; Justin V. Migacz; Daniel M. Schwartz; John S. Werner; Iwona Gorczynska : Challenges and advantages in wide-field optical coherence tomography angiography imaging of the human retinal and choroidal vasculature at 1.7-MHz A-scan rate J. Biomed. Opt. 22(10), 106018 (2017) doi:doi:10.1117/1.JBO.22.10.106018
  • Manmohan Singh, Zhaolong Han, Achuth Nair, Alexander Schill, Michael D. Twa, Kirill V. Larin: Applanation optical coherence elastography: noncontact measurement of intraocular pressure, corneal biomechanical properties, and corneal geometry with a single instrument J. Biomed. Opt. 22(2), 020502 (Feb 20, 2017) doi:10.1117/1.JBO.22.2.020502
  • L. Ambrozinski, S. Song, S. J. Yoon, I. Pelivanov, D. Li, L. Gao, T. T. Shen, R. K. Wang, and M. O’Donnell: Acoustic micro-tapping for non-contact 4D imaging of tissue elasticity.. Scientific Reports 6, 38967 (2016) doi:10.1038/srep38967
  • Shaozhen Song, Wei Wei, Bao-Yu Hsieh, Ivan Pelivanov, Tueng T. Shen Matthew O'Donnell and Ruikang K. Wang: Strategies to improve phase-stability of ultrafast swept source optical coherence tomography for single shot imaging of transient mechanical waves at 16kHz frame rate. Appl. Phys. Lett. 108, 191104 (2016) doi:10.1063/1.4949469
  • Wei Wei, Jingjiang Xu, Utku Baran, Shaozhen Song, Wan Qin, Xiaoli Qi, Ruikang K. Wang: Intervolume analysis to achieve four-dimensional optical microangiography for observation of dynamic blood flow. J. Biomed. Opt. 21(3), 036005 (2016) doi:10.1117/1.JBO.21.3.036005
  • Shang Wang, Manmohan Singh, Andrew L. Lopez, Chen Wu, Raksha Raghunathan, Alexander Schill, Jiasong Li, Kirill V. Larin, and Irina V. Larina: Direct four-dimensional structural and functional imaging of cardiovascular dynamics in mouse embryos with 1.5MHz optical coherence tomography. Optics Letters Vol. 40, Issue 20, pp. 4791-4794 (2015) doi:10.1364/OL.40.004791
  • Zhongwei Zhi, Wan Qin, Jingang Wang, Wei Wei, and Ruikang K. Wang: 4D optical coherence tomography-based micro-angiography achieved by 1.6-MHz FDML swept source. Optics Letters Vol. 40, Issue 8, pp. 1779-1782 (2015) doi:10.1364/OL.40.001779
  • Manmohan Singh, Chen Wu, Chih-Hao Liu, Jiasong Li, Alexander Schill, Achuth Nair, and Kirill V. Larin: Phase-sensitive optical coherence elastography at 1.5 million A-Lines per second. Optics Letters Vol. 40, Issue 11, pp. 2588-2591 (2015) doi:10.1364/OL.40.002588

Fiber sensing

  • Gilbertson et. al.: High Speed, Localized Multi-Point Strain Measurements on a Containment Vessel at 1.7 MHz Using Swept-Wavelength Laser-Interrogated Fiber Bragg Gratings.
    Sensors 2020, 20(20), 5935;