Low loss mid-infrared ZBLAN waveguides for future astronomical applications

Gross, Simon; Jovanović, Nemanja; Sharp, Adam; Ireland, Michael; Lawrence, Jon; Withford, Michael J.

doi:10.1364/oe.23.007946

Cited by 54 publications

(21 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Accordingly, a recent study has been devoted to femtosecond laser inscription of waveguides in optical materials known for their optical transmission in the mid-IR [6]. Other previous studies were carried out using crystalline materials [7] but also with multicomponent glasses such as chalcogenide (ChG) [8] and fluoride glasses [9]. In most cases however, the optical characteristics of the waveguides and the material properties fall short or come with serious trade-offs.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, waveguides relying on a positive index contrast (core waveguides) inscribed in multicomponent glasses generally present a low index contrast (< 1 x 10 −3 ) and relatively high propagation losses. The sole exception being the DCW waveguides inscribed in ZBLAN by Gross et al [9] who reported propagation losses of 0.3 dB/cm measured at λ = 4 µm.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Femtosecond laser direct inscription of mid-IR transmitting waveguides in BGG glasses

Bérubé

Camus

Messaddeq

et al. 2017

Opt. Mater. Express

View full text Add to dashboard Cite

International audienceA detailed investigation of the photo-inscription of waveguides in barium gallo-germanate (BGG, BaO, GeO2, Ga2O3) glass is presented. Upon irradiation of BGG glass samples of different contents of germanium dioxide with a femtosecond laser pulse train, positive refractive index changes are produced over a wide range of exposure conditions. Waveguides with a controllable diameter ranging from 4 to 35 µm and a maximum index change up to 10−2 were inscribed. A glass sample with custom molecular composition was purified to remove hydroxyl ions and reduce the strong absorption band near 3 µm. A careful tailoring of the writing conditions allowed for the inscription of low-loss waveguides supporting only two transverse modes at the wavelength of 2.78 µm. An upper bound for the propagation losses of 0.5 ± 0.1 dB/cm was determined, showing the great potential of the BGG glass family for the fabrication of core waveguides operating in the 2-4 µm spectral range. Our results actually open a pathway towards the integration of mid-IR photonic devices based on the BGG glass family

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Femtosecond laser direct inscription of mid-IR transmitting waveguides in BGG glasses

Bérubé

Camus

Messaddeq

et al. 2017

Opt. Mater. Express

View full text Add to dashboard Cite

show abstract

“…Ultrafast laser writing provides the ability to fabricate waveguide crossings with zero cross-talk and beam combiners based on two-dimensional arrays of coupled waveguides (DBC, see previous section). Two-and three-telescope structures have been successfully realised for mid-infrared (Labadie et al 2011, 52 ; 33 Arriola et al 2014, 53 Gross et al 2015, 54 Tepper et al 2016 55 ). Low propagation losses in the order of 0.2 dB/cm have also been reported in ZBLAN 54 and GLS ‡ .…”

Section: Technological Platforms For Mid-infrared Photonicsmentioning

confidence: 99%

Beam combination schemes and technologies for the Planet Formation Imager

Minardi¹,

Diener²,

Nayak³

et al. 2018

Optical and Infrared Interferometry and Imaging VI

View full text Add to dashboard Cite

The Planet Formation Imager initiative aims at developing the next generation large scale facility for imaging astronomical optical interferometry operating in the mid-infrared. Here we report on the progress of the Planet Formation Imager Technical Working Group on the beam-combination instruments. We will discuss various available options for the science and fringe-tracker beam combination instruments, ranging from direct imaging, to non-redundant fiber arrays, to integrated optics solutions. Besides considering basic characteristics of the schemes, we will investigate the maturity of the available technological platforms at near-and mid-infrared wavelengths.

show abstract

“…The mid-infrared (MIDIR) spectral region (2-20 µm) became a field of major applicative interest over the past decade. Sharp and strong molecular absorption bands of various chemical compounds in that region make the use of MIDIR radiation well-adapted for a large number of applications, including biosensing and medical diagnosis [1][2][3], security and defense [4][5][6][7], and astronomy, among others [8,9]. Such a wide range of applications led to the development of a plethora of photonic components, including sources [10][11][12], waveguides, spectrometers [13,14], and modulators for…”

Section: Introductionmentioning

confidence: 99%

Wideband Ge-Rich SiGe Polarization-Insensitive Waveguides for Mid-Infrared Free-Space Communications

et al. 2018

View full text Add to dashboard Cite

Featured Application: mid-infrared free-space communications.Abstract: The recent development of quantum cascade lasers, with room-temperature emission in the mid-infrared range, opened new opportunities for the implementation of ultra-wideband communication systems. Specifically, the mid-infrared atmospheric transparency windows, comprising wavelengths between 3-5 µm and 8-14 µm, have great potential for free-space communications, as they provide a wide unregulated spectrum with low Mie and Rayleigh scattering and reduced background noise. Despite the great efforts devoted to the development of mid-infrared sources and detectors, little attention is dedicated to the management of polarization for signal processing. In this work, we used Ge-rich SiGe alloys to build a wideband and polarization-insensitive mid-infrared photonic platform. We showed that the gradual index change in the SiGe alloys enabled the design of waveguides with remarkably low birefringence, below 2 × 10 −4 , over ultra-wide wavelength ranges within both atmospheric transparency windows, near wavelengths of 3.5 µm and 9 µm. We also report on the design of a polarization-independent multimode interference device achieving efficient power splitting in an unprecedented 4.5-µm bandwidth at around 10-µm wavelength. The ultra-wideband polarization-insensitive building blocks presented here pave the way for the development of high-performance on-chip photonic circuits for next-generation mid-infrared free-space communication systems.lock-in detection [15,16]. Moreover, in order to reach higher MIDIR wavelengths, various photonic platforms were developed, such as III-V materials [17][18][19], chalcogenide [20][21][22][23], and silicon and silicon-compatible materials [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40]. MIDIR photonic integrated circuits leveraging the mature Si technology have great potential for low-power consumption and low-cost systems that are meant to outperform existing technologies. Among the available group IV-compatible MIDIR platforms, silicon germanium (SiGe), and more specifically, Ge-rich SiGe alloys exhibit a compelling combination of flexible material tunability [34], large transparency, wideband operation [35][36][37], and remarkable nonlinear properties [40]. Here, we study the use of the Ge-rich SiGe platform to develop wideband and polarization-independent MIDIR components for free-space communications.Earth atmosphere's absorption spectrum contains two transparency windows in the MIDIR region that are very interesting for free-space communications. These two MIDIR windows, which lie within the 3-5 µm (mid-wavelength IR, MWIR) and 8-14 µm (long-wavelength IR, LWIR) wavelength ranges, present two major advantages compared to their near-infrared (NIR) counterparts, namely (i) reduced Rayleigh and Mie scattering [41,42], and (ii) improved robustness against spectral radiance from the main sources of background noise in free-space optical communications (moon, sun, earth, and city lights) [41,42]. As li...

show abstract

Low loss mid-infrared ZBLAN waveguides for future astronomical applications

Cited by 54 publications

References 32 publications

Femtosecond laser direct inscription of mid-IR transmitting waveguides in BGG glasses

Femtosecond laser direct inscription of mid-IR transmitting waveguides in BGG glasses

Beam combination schemes and technologies for the Planet Formation Imager

Wideband Ge-Rich SiGe Polarization-Insensitive Waveguides for Mid-Infrared Free-Space Communications

Contact Info

Product

Resources

About