Photonics Research, Volume. 9, Issue 11, 2303(2021)
Ultrawide-band silicon microring avalanche photodiode with linear photocurrent-wavelength response
Fig. 1. (a) Design of the MR APD and (b) schematic of the Si rib waveguide embedded with a
Fig. 2. (a) Linear resonance transmission spectrum of the microring at 0 V bias (
Fig. 3. Optical transmission spectra of the MR APD near the 1522.2 nm resonance for increasing input optical powers at reverse bias voltage (a)
Fig. 4. (a) Plot of the total loss coefficient
Fig. 5. Variations of the photocurrent with wavelength of the MR APD at 15 V reverse bias voltage; black curve is the response at low input optical power (46 μW) multiplied by a factor of 10 to make it visible; red and green curves are the responses at high input optical power (1.86 mW) obtained from forward and reverse wavelength scans, respectively. The dotted line is the best linear fit to the forward photocurrent spectrum over the 1518.5–1522.5 nm wavelength range.
Fig. 6. Peak responsivity and ratio of the peak photocurrent to dark current of the MR APD as functions of the input optical power at 13 and 15 V reverse bias voltages.
Fig. 7. Detected photocurrent waveform (converted to voltage) for a square-wave optical input signal of 1 MHz frequency; lower panels are the zoomed-in views of the rising and falling edges of the waveform.
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Yang Ren, Vien Van. Ultrawide-band silicon microring avalanche photodiode with linear photocurrent-wavelength response[J]. Photonics Research, 2021, 9(11): 2303
Category: Silicon Photonics
Received: Jul. 20, 2021
Accepted: Sep. 6, 2021
Published Online: Oct. 27, 2021
The Author Email: Yang Ren (yr@ualberta.ca)