Electro-optical tunable waveguide Bragg gratings in lithium niobate induced by femtosecond laser writing

Horn, Wolfgang; Kroesen, Sebastian; Herrmann, Jonathan; Imbrock, Jörg; Denz, Cornélia

doi:10.1364/oe.20.026922

Cited by 47 publications

(31 citation statements)

References 24 publications

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“…Using this technology for devices operating in the telecom band can add further advantages because the insertion losses of these devices in an optical fiber network are very low, due to the almost perfect mode matching and the reduced propagation losses 20,21 . The quality of photonic circuits written via femtosecond lasers has been proven by the demonstration of several classical devices in glass as waveguide amplifiers, lasers, broadband couplers, and demultiplexers [22][23][24][25] , as well as the writing of electro-optic modulators in crystals 26,27 . Although this fabrication technology has been widely used to produce quantum devices in the 800-nm wavelength range, no investigation on the performances of these devices at telecom wavelengths in the quantum regime has been performed.…”

Section: Introductionmentioning

confidence: 99%

Thermally reconfigurable quantum photonic circuits at telecom wavelength by femtosecond laser micromachining

et al. 2015

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The importance of integrated quantum photonics in the telecom band is based on the possibility of interfacing with the optical network infrastructure that was developed for classical communications. In this framework, femtosecond laser-written integrated photonic circuits, which have already been assessed for use in quantum information experiments in the 800-nm wavelength range, have great potential. In fact, these circuits, being written in glass, can be perfectly mode-matched at telecom wavelength to the in/out coupling fibers, which is a key requirement for a low-loss processing node in future quantum optical networks. In addition, for several applications, quantum photonic devices must be dynamically reconfigurable. Here, we experimentally demonstrate the high performance of femtosecond laser-written photonic circuits for use in quantum experiments in the telecom band, and we demonstrate the use of thermal shifters, which were also fabricated using the same femtosecond laser, to accurately tune such circuits. State-of-the-art manipulation of single-and two-photon states is demonstrated, with fringe visibilities greater than 95%. The results of this work open the way to the realization of reconfigurable quantum photonic circuits based on this technological platform.

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Section: Introductionmentioning

confidence: 99%

Thermally reconfigurable quantum photonic circuits at telecom wavelength by femtosecond laser micromachining

et al. 2015

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“…Again downstream data is shared among multiple ONUs through the 1 × 32 optical splitter. We assumed the insertion losses of 3 dB [34] for both CO AWG and RN AWG. 16.5 dB losses are also considered for the splitter [39].…”

Section: Simulation Setup and Resultsmentioning

confidence: 99%

“…At each output port of RN AWG, two contiguous wavelengths are transmitted, thus providing up to 20 Gbps data rate. To increase the AWG channel spacing or to shift the AWG central frequency, electro-optical tunable AWG [33,34] or thermo-optical tunable AWG [33][34][35] can be used. Thermo-optic tunable silicon-based AWG using TiN heater has already been demonstrated in [34].…”

Section: Other Illustrative Examples Of Proposed Architecturementioning

confidence: 99%

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Adaptive bandwidth mechanism using dual rate OLT for energy efficient WDM–TDM passive optical network

Garg

Janyani

2017

Telecommun Syst

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This paper reviews various energy efficient approaches in existence and proposes a Hybrid WDM-TDM PON architecture that allows the adaptive bandwidth allocation mechanism to reduce central office power consumption with acceptable performance. Our proposed architecture allows sending two signals, one broadband and other narrowband to each optical networking unit so an appropriate signal can be utilized according to the traffic demand. In case of very low traffic, only narrowband signal is used and a significant amount of energy consumption and OPEX is reduced. By using 2 × N power splitter and interleaver, proposed architecture provides broadcasting at both broadband and narrowband signal depending on the required link rate. This further reduces energy consumption and OPEX by avoiding the transmission of same signal from multiple sources. Offered data rates to the optical distribution networks (ODNs) may also be varied by doubling the wavelength spacing of remote node AWG so that two contiguous wavelengths can be transmitted at each port or ODN. This provides the geographical dynamic bandwidth allocation. Proposed architecture also support simultaneous transmission of both broadband and narrowband signals to the ODN to provide bandwidth scalability and network extensibility for supporting future access network in terms of new users and data rates. As two signals are reaching to any ODN, resiliency against OLT TRx and line card failure is also achieved. The performance of the proposed design is verified by simulation results in terms of bit error rate and receiver sensitivity to demonstrate its feasibility for the next-generation optical access network.

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“…For comparison, Table 1 lists κ values for The duty cycle was fixed at 35%, whereas the writing pulse energy was varied. [21] PbP 1551 25 -Boro-aluminosilicate (Eagle2000) [22] PbP 1551 145 0.6 Boro-aluminosilicate (Eagle2000) [23] PbP 1550 472 0.5 Soda-lime [27] Two-step PbP 1577 14 -Fused silica [26] Modulated burst 1548 111 1.5 Er:Yb codoped phosphate [30] Modulated burst 1537 242 -Yb-doped phosphate [42] Modulated burst 1535 221 -Boro-aluminosilicate (Eagle2000) [31] Modulated burst 1551 713 -Fused silica [43] Modulated burst 1546 36 0.7 Boro-aluminosilicate (Eagle2000) [24] PbP 799 65 -Boro-aluminosilicate (Eagle2000) [28] Modulated burst 1552 157 -ZBLAN [29] PbP überstructure 1550 324 -Boro-aluminosilicate (Eagle2000) [44] Multiscan modulated burst 1563 177 -LiNbO 3 [45] Modulated burst stressors 1540 45 -Boro-aluminosilicate (Eagle2000) [41] PbP 648 136 -Boro-aluminosilicate (Eagle2000) [41] PbP 698 183 0.8 Boro-aluminosilicate (Eagle2000) [41] PbP 748 187 -Boro-aluminosilicate (Eagle2000) [41] PbP 798 163 -Fused silica [46] Modulated burst 1550 210 2.2 Fused silica [47] Modulated burst 1549 280 < 1 Chalcogenide (GLS) [48] Modulated burst 1551 179 -LiNbO 3 [49] Multiscan modulated burst (depressed clad) 1558 1230 1.52-3.51 Boro-aluminosilicate (Eagle2000) [50] Two-step PbP 1545 120 -Fused silica [25] PbP (waveguide bundle) 840 126 -Fused silica [25] PbP (waveguide bundle) 1550 220 1.6 Borosilicate (AF45) [51] Modulated …”

Section: Coupling Coefficient κmentioning

confidence: 99%

Fabricating waveguide Bragg gratings (WBGs) in bulk materials using ultrashort laser pulses

et al. 2017

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Optical waveguide Bragg gratings (WBGs) can be created in transparent materials using femtosecond laser pulses. The technique is conducted without the need for lithography, ion-beam fabrication methods, or clean room facilities. This paper reviews the field of ultrafast laser-inscribed WBGs since its inception, with a particular focus on fabrication techniques, WBG characteristics, WBG types, and WBG applications.

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Electro-optical tunable waveguide Bragg gratings in lithium niobate induced by femtosecond laser writing

Cited by 47 publications

References 24 publications

Thermally reconfigurable quantum photonic circuits at telecom wavelength by femtosecond laser micromachining

Thermally reconfigurable quantum photonic circuits at telecom wavelength by femtosecond laser micromachining

Adaptive bandwidth mechanism using dual rate OLT for energy efficient WDM–TDM passive optical network

Fabricating waveguide Bragg gratings (WBGs) in bulk materials using ultrashort laser pulses

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