Silicon-based monolithically integrated 9-bit tunable optical delay line chip
The monolithically integrated multi-bit optical time-delay chip is based on thick-film SOI silicon photonics technology and is currently the optical time-delay device product with the best overall performance and the highest level of integration. It adopts a binary multi-stage delay loop structure; the chip integrates delay switching switches and delayed optical waveguide loops that include equalization and clutter-suppression attenuators. The delay switching time reaches below 200ns, and the maximum total delay amount is 1022ps; the delay precision is 0.5ps, and the on-chip single-stage delay loss is as low as 0.8dB/bit. Compared with traditional electrical delay chips that use microwave transmission lines, optical time-delay devices can be applied to any microwave and millimeter-wave frequency band, and feature extremely low crosstalk and an extremely high extinction ratio for non-target delayed signals. The 9-bit tunable optical delay chip with a maximum delay of 1ns is as small as 2cm×1.5cm, greatly reducing system volume; because the optical carrier frequency is up to 4 orders of magnitude higher than the microwave signal, the photonic-integrated time-delay device chip has signal processing capability covering the full frequency band from meter waves to millimeter waves, and is suitable for beamforming applications of various ultra-broadband phased arrays.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Operating Wavelength | 1530-1570 nm |
| Delay bits [Customizable] | 9 |
| Minimum delay step [Customizable] | 2 ps |
| Adjustable maximum delay | 1022 ps |
| Delay precision [≤16ps delay amount delay time] | ±0.5 ps |
| Delay precision [18~64ps delay amount delay time] | ±1 ps |
| Delay precision [66~512ps delay amount delay time] | ±2 ps |
| Delay precision [514~1022ps delay amount delay time] | ±3 ps |
| Delay switching time | 200 ns |
| Insertion Loss [13dB max] | 11 dB |
| Loss difference among delay states | ±1 dB |
| Maximum tolerable optical power [26dBm max] | 23 dBm |
| Return Loss | 45 dB |
| Chip size | 20 mm × 15 mm × 0.7 mm |
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Datasheet
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