Infrared dispersive optics (IR)

The DM technology has become already well-established in the systems based on Ti:Sa lasers (~800 nm) and near infrared Yb:YAG lasers (~1030 nm). Recently, the attention has shift on to Thulium- and Holmium-based lasers systems operating around 2 μm [1], as well as novel technology based on 2.4 μm chromium doped zinc sulfide (Cr:ZnS) or chromium doped zinc selenide (Cr:ZnSe) extending the laser output to 3.2 μm [2]. For further development of this technology, dispersive mirrors in the infrared spectral range 1.6-4 μm are strongly demanded [3,4]. Following the latest interest, Ultrafast Innovations GmbH – a spin-off from the Max Planck Institute of Quantum Optics and Ludwig Maximillian University – has substantially extended portfolio of dispersive infrared optics now offering mirrors with positive and negative group-delay dispersion (GDD), as well as mirrors with non-zero third order dispersion (TOD). Si/SiO2 material pair is used for production of our IR dispersive optics. Due to a well-optimized deposition process, mirrors exhibit reduced O-H absorption around the wavelength of 2.7 μm mounting to below 1% losses in the range from 2.8 μm to 2.9 μm.

Key Product Features:

  • Spectral range from 1.6 μm up to 4 μm
  • Reflectance > 99 % per bounce (>99.8 % at 2.7μm)
  • Diverse dispersive properties: positive and negative GDD compensation w/wo TOD possible
  • Custom substrate shapes and sizes on request
  • Extended portfolio of products

Ultra-broadband IR optics:

Broadband infrared dispersive mirror CM1851

Broadband infrared dispersive mirror CM1851 from the ref. 3,4.

Broadband infrared dispersive mirror CM1953

Broadband infrared dispersive mirror CM1953 from the ref. 3,4.

IR optics with positive GDD:

Infrared dispersive mirrors with
positive GDD: IR1402

Infrared dispersive mirrors with positive GDD: IR1402

Infrared dispersive mirrors with positive GDD: HD1715

Infrared dispersive mirrors with positive GDD: HD1715.

IR optics with negative GDD:

Infrared dispersive mirrors with negative GDD: PC1741

Infrared dispersive mirrors with negative GDD: PC1741

Infrared dispersive mirrors with negative GDD: HD1501

Infrared dispersive mirrors with negative GDD: HD1501

IR optics with TOD:

Infrared dispersive mirrors with
TOD: IR1304_RC2

Infrared dispersive mirrors with TOD: IR1304_RC2

Infrared dispersive mirrors with TOD: TOD1601

Infrared dispersive mirrors with TOD: TOD1601

References:

  • [1] K. Yang, et al., “Passively mode-locked Tm, Ho:YAG laser at 2 μm based on saturable absorption of intersubband transitions in quantum wells,” Opt. Express 18(7), 6537 (2010)
  • [2] I. T. Sorokina and E. Sorokin, “Femtosecond Cr2+ based lasers,” IEEE J. Sel. Top. Quantum Electron. 21(1), 273–291(2015)
  • [3] V. Pervak, T. Amotchkina, Q.Wang, O. Pronin, K. F. Mak, and M. Trubetskov, “2/3 octave Si/SiO2 infrared dispersive mirrors open new horizons in ultrafast multilayer optics,” Opt. Express 27(1), 55 (2019)
  • [4] V. Pervak, et al., “Complementary Si/SiO2 dispersive mirrors for 2-4 μm spectral range,” Opt. Express 27(24), 34901 (2019)

Please contact us for further information and references.