Abstract
Monolithic integrated receivers are highly desired due to the potential of mass production and the reduction of device size and cost. In this Letter, a monolithic integrated optical wireless communication (OWC) receiver with optical preamplifiers is designed, fabricated, and investigated to achieve high sensitivity based on photonic integration technology. The proposed receiver consists of one waveguide PIN photodetector integrated with two semiconductor optical amplifiers (SOAs). Compared with using a one-stage optical amplifier, using two independent SOAs as a two-stage amplifier offers the advantage of optimizing the noise figure of each amplifier independently by tuning their injection currents, which leads to the reduction of the total noise and an improvement of the receiver sensitivity. The achieved sensitivity for a 10-Gb/s OOK signal with 10-dBm launch power at 1550-nm wavelength by using the designed receiver is up to −27.5 dBm at a bit-error-ratio (BER) level of 3.1×10−3 over a 0.9-m indoor free-space link. The experimental results show the potential to achieve a high-speed OWC link with high sensitivity by using a cascaded SOA/PIN monolithic integrated receiver.
| Original language | English |
|---|---|
| Pages (from-to) | 2578-2581 |
| Number of pages | 4 |
| Journal | Optics Letters |
| Volume | 47 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 15 May 2022 |
Funding
Funding. Major Key Project of PCL; Sichuan Science and Technology Program (2020YFH0108); ZJU-TU/e IDEAS project; NWO Zwaartekracht program on Integrated Nanophotonics. Disclosures. The authors declare no conflicts of interest. Data availability. Data underlying the results presented in this Letter are not publicly available at this time but may be obtained from the authors upon reasonable request.