Ultra-compact silicon-arrayed waveguide grating routers for optical interconnect systems

Guangyi Song; Jun Zou; Jianjun He

doi:10.3788/COL201715.030603

Chinese Optics Letters, Volume. 15, Issue 3, 030603(2017)

Ultra-compact silicon-arrayed waveguide grating routers for optical interconnect systems

Guangyi Song¹, Jun Zou², and Jianjun He^1、*

Author Affiliations

¹State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China

²College of Science, Zhejiang University of Technology, Hangzhou 310028, China

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Figures & Tables(9)

Fig. 1. Simulated spectral responses of (a) first input channel, (b) second input channel, (c) third input channel, and (d) fourth input channel.

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Fig. 2. (a) Scanning electron microscope images of the fabricated AWGR and (b) tapers between the FPR and arrayed waveguides.

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Fig. 3. Measured spectral responses of (a) first input channel, (b) second input channel, (c) third input channel, and (d) fourth input channel.

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Fig. 4. Measured transmission spectrum of the center input channel of the AWGR with the 6.4 nm channel spacing.

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Fig. 5. Measured transmission spectrum of the edge input channel of the AWGR with the 6.4 nm channel spacing.

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Fig. 6. Insertion loss of every channel of the AWGR with the 6.4 nm channel spacing.

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Fig. 7. Measured transmission spectrum of the center input channel of the AWGR with the 3.2 channel spacing.

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Table 1. Design Parameters

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Table 1. Design Parameters

Parameter	Design A	Design B	Design C
Number of channels ( $N_{ch}$ )	4	8	16
Central wavelength ( $λ_{c}$ )	1550 nm	1550 nm	1550 nm
Channel spacing ( $Δ λ$ )	20 nm	6.4 nm	3.2 nm
FSR	80 nm	51.2 nm	51.2 nm
Diffraction order ( $m$ )	9	15	15
Length increment ( $Δ L$ )	7.96 μm	12.9 μm	12.9 μm
Pitch of adjacent array waveguides ( $d_{a}$ )	1.8 μm	1.8 μm	1.8 μm
Pitch of adjacent input/output waveguides ( $d_{r}$ )	2.5 μm	2 μm	2 μm
Length of FPR ( $R$ )	25 μm	37.1 μm	74.2 μm
Number of arrayed waveguides ( $N_{wg}$ )	17	25	40
Footprint	$0.27 mm \times 0.19 mm$	$0.37 mm \times 0.37 mm$	$0.58 mm \times 0.77 mm$

Table 2. Comparison of Reported AWGRs on SOI Platform with Devices in this Work
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Table 2. Comparison of Reported AWGRs on SOI Platform with Devices in this Work
Reference Number of channel Channel spacing (nm) Loss (dB) Crosstalk (dB)
[5] 8 0.8 2.92 −16.9–17.8
[6] 512 0.2 11.3 −4
[7] 8 3.2 2.4 −17.6–25.1
This work 4 20 2.5 −20
This work 8 6.4 3 −18
This work 16 3.2 4.9 −12

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Guangyi Song, Jun Zou, Jianjun He, "Ultra-compact silicon-arrayed waveguide grating routers for optical interconnect systems," Chin. Opt. Lett. 15, 030603 (2017)

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