Wavelength- and time-division multiplexing via pump current variation of a pulsed semiconductor laser -- a method of synchronization for quantum key distribution
arXiv:2209.02591 · doi:10.1109/JQE.2023.3237265
Abstract
The dependence of the semiconductor laser wavelength on the pump current is a well-known phenomenon, which is generally attributed to a change in the refractive index of the active layer due to carrier injection. This effect is usually considered to be a drawback as it causes frequency chirping of the pulses produced via direct current modulation. Here, we show that at high values of thermal resistance of a laser diode, the lasing wavelength is red-shifted due to the change of the refractive index caused by a thermal effect and this shift may significantly exceed (in absolute value) the blue shift related to a refractive index change induced by the carrier injection. We propose to benefit from the ability to tune wavelength by the pump current variation and use the same laser to generate qubits and synchronization optical pulses for quantum key distribution at different wavelengths. To demonstrate the proposed method of synchronization, we perform numerical simulations as well as proof-of-principle experiments.
arXiv comment10 pages, 10 figures
References in corpus (27)
- Quantum Cryptography
- A quantum network of clocks
- Continuous variable quantum cryptography
- Quantum enhanced positioning and clock synchronization
- Quantum Clock Synchronization Based on Shared Prior Entanglement
- Real-world two-photon interference and proof-of-principle quantum key distribution immune to detector attacks
- Quantum key distribution and 1 Gbit/s data encryption over a single fibre
- High rate, long-distance quantum key distribution over 250km of ultra low loss fibres
- Proof-of-principle demonstration of measurement-device-independent quantum key distribution using polarization qubits
- Coexistence of high-bit-rate quantum key distribution and data on optical fiber
- Integrating quantum key distribution with classical communications in backbone fiber network
- Coexistence of continuous variable QKD with intense DWDM classical channels
- Quantum algorithm for distributed clock synchronization
- Ultra-high bandwidth quantum secured data transmission
- A fast and versatile QKD system with hardware key distillation and wavelength multiplexing
- Quantum key distribution with 1.25 Gbps clock synchronization
- Ultra fast quantum key distribution over a 97 km installed telecom fiber with wavelength-division multiplexing clock synchronization
- Laser seeding attack in quantum key distribution
- Simple Quantum Key Distribution with qubit-based synchronization and a self-compensating polarization encoder
- Clock synchronization by remote detection of correlated photon pairs
- Fast and simple qubit-based synchronization for quantum key distribution
- Remote quantum clock synchronization without synchronized clocks
- Long-distance transmission of quantum key distribution coexisting with classical optical communication over weakly-coupled few-mode fiber
- Resource-effective Quantum Key Distribution: a field-trial in Padua city center
- Low loss QKD optical scheme for fast polarization encoding
- Modular quantum key distribution setup for research and development applications
- Direct phase modulation via optical injection: theoretical study