Researching | Direct phase control method f binary phaseshift keying space coherent laser communication

Journals >Chinese Optics Letters >Volume 20 >Issue 6 >Page 060601 > Article

Chinese Optics Letters
Vol. 20, Issue 6, 060601 (2022)

Direct phase control method for binary phase-shift keying space coherent laser communication

Weijie Ren^1、2, Jianfeng Sun^3、*, Peipei Hou¹, Ronglei Han^1、2, Hongyu He¹, Haisheng Cong^1、2, Chaoyang Li¹, Longkun Zhang¹, and Yuxin Jiang^1、2

Author Affiliations

¹Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

²Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

³Department of Aerospace Laser Engineering, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

show less

DOI: 10.3788/COL202220.060601 Cite this Article Set citation alerts

Weijie Ren, Jianfeng Sun, Peipei Hou, Ronglei Han, Hongyu He, Haisheng Cong, Chaoyang Li, Longkun Zhang, Yuxin Jiang. Direct phase control method for binary phase-shift keying space coherent laser communication[J]. Chinese Optics Letters, 2022, 20(6): 060601 Copy Citation Text

show less

Abstract

An optical phase locking method based on direct phase control is proposed. The core of this method is to synchronize the carrier by directly changing the phase of the local beam. The corresponding experimental device and the supporting algorithm were configured to verify the feasibility of this method. Phase locking can be completed without cycle skipping, and the acquisition time is 530 ns. Without an optical preamplifier, a sensitivity of

- 34.4 dBm

is obtained, and the bit error rate is

10^{- 9}

for 2.5 Gbit/s binary phase-shift keying modulation. The measured standard deviation of the phase error is 5.2805°.

Keywords

direct phase control IQ modulation optical phase-locked loop space coherent laser communication

V_{I} (t) = 2 (1 - k_{S}) R R_{L} \sqrt{P_{S} P_{LO}} \cos [φ_{n} (t) - φ_{LO} (t) + θ (t)] + n_{I} (t),

(1)

View in Article

V_{Q} (t) = 2 k_{S} R R_{L} \sqrt{P_{S} P_{LO}} \sin [φ_{n} (t) - φ_{LO} (t) + θ (t)] + n_{Q} (t),

(2)

View in Article

V_{I} (k) = A \cos [φ_{n} (k) - φ_{LO} (k) + θ (k)] + n_{I} (k),

(3)

View in Article

V_{Q} (k) = A \sin [φ_{n} (k) - φ_{LO} (k) + θ (k)] + n_{Q} (k),

(4)

View in Article

V_{SQUARE} [k] = {(V_{I} [k] + j \times V_{Q} [k])}^{2} = A^{2} \exp (j \times 2 θ_{d} [k]) + 2 A \exp (j \times θ_{d} [k]) \times n_{I} [k] + 2 A \exp [j \times (θ_{d} [k] + π / 2)] \times n_{Q} [k],

(5)

View in Article

θ_{error} [k] = \frac{1}{2} atan 2 [imag (V_{SQUARE} [k]) / real (V_{SQUARE} [k])],

(6)

View in Article

E_{out} (t) = - \sqrt{2 p_{LO}} \cos (ω_{LO} t + φ_{LO}) \times \sin [\frac{A_{rf} \sin (ω_{rf} t + φ_{rf} + Δ φ)}{2 V_{π}} \times π] - \sqrt{2 p_{LO}} \sin (ω_{LO} t + φ_{LO}) \times \sin [\frac{A_{rf} \cos (ω_{rf} t + φ_{rf} + Δ φ)}{2 V_{π}} \times π],

(7)

View in Article

E_{out} (t) \approx - 2 \sqrt{p_{LO}} \cos (ω_{LO} t + φ_{LO}) \times \frac{π A_{rf} \sin (ω_{rf} t + φ_{rf} + Δ φ)}{2 V_{π}} - 2 \sqrt{p_{LO}} \sin (ω_{LO} t + φ_{LO}) \times \frac{π A_{rf} \cos (ω_{rf} t + φ_{rf} + Δ φ)}{2 V_{π}} = - 2 \sqrt{p_{LO}} \frac{π A_{rf}}{2 V_{π}} \sin [(ω_{LO} + ω_{rf}) t + φ_{LO} + φ_{rf} + Δ φ] .

(8)

View in Article

{\begin{matrix} V_{I DAC} (t) = A_{rf} \cos (ω_{base} t) \\ V_{Q DAC} (t) = A_{rf} \sin (ω_{base} t) \end{matrix},

(9)

View in Article

{\begin{matrix} V_{I DAC} (t) = A_{rf} \cos (ω_{base} t + θ_{error (1)}) \\ V_{Q DAC} (t) = A_{rf} \sin (ω_{base} t + θ_{error (1)}) \end{matrix} .

(10)

View in Article

{\begin{matrix} V_{I DAC} (t) = A_{rf} \cos [(ω_{base} + ω_{error (1)}) t + \sum_{a = 1}^{N} θ_{error (a)}] \\ V_{Q DAC} (t) = A_{rf} \sin [(ω_{base} + ω_{error (1)}) t + \sum_{a = 1}^{N} θ_{error (a)}] \end{matrix},

(11)

View in Article

ω_{error (1)} = \sum_{a = 1}^{N} θ_{error (a)} / (N \times T),

(12)

View in Article

{\begin{matrix} V_{I DAC} (t) = A_{rf} \cos [(ω_{base} + \sum_{b = 1}^{x} ω_{error (b)}) t + \sum_{a = 1}^{x \times N + y} θ_{error (a)}] \\ V_{Q DAC} (t) = A_{rf} \sin [(ω_{base} + \sum_{b = 1}^{x} ω_{error (b)}) t + \sum_{a = 1}^{x \times N + y} θ_{error (a)}] \end{matrix},

(13)

View in Article

P_{b} (Φ) = \frac{1}{2} erfc (\sqrt{SNR} \cos Φ),

(14)

View in Article

erfc (x) = \frac{2}{\sqrt{π}} \int_{x}^{+ \infty} e^{- t^{2}} d t .

(15)

View in Article

SNR = \frac{η P_{S}}{h ν R_{b}},

(16)

View in Article

V_{shot-noise} = \sqrt{4 q B_{e} R P_{LO single}} \times R_{L},

(17)

View in Article

Figures&Tables (7)

References (25)

Copy Citation Text

Weijie Ren, Jianfeng Sun, Peipei Hou, Ronglei Han, Hongyu He, Haisheng Cong, Chaoyang Li, Longkun Zhang, Yuxin Jiang. Direct phase control method for binary phase-shift keying space coherent laser communication[J]. Chinese Optics Letters, 2022, 20(6): 060601

Download Citation

Set citation alerts for the article

Set citation alerts for the article

Save the article for my favorites

Paper Information

Recommended Topics

laser devices and laser physics

Lasers and Laser Optics

laser manufacturing

Instrumentation, Measurement and Metrology

Set citation alerts for the article

Please enter your email address