High-Power and Low RIN Performance of a 1.55 μm DFB Laser for 10 Gb/s Satellite Optical Links

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Abstract
In this letter, we present a 1.55- $\mu \text{m}$ DFB laser that possesses characteristics including high power, low noise, and high-speed direct modulation capabilities across a wide temperature range. The DFB laser demonstrates an optical power of 125.76-mW and sustains power exceeding 45-mW, with an SMSR surpassing 45-dB at 85°C. It exhibits the ability to modulate signals at frequencies exceeding 5.26-GHz and transmits a clear 10-Gb/s eye pattern. The RIN maintains as low as -153.51-dB/Hz within the dynamic range of 0–10-GHz, and even with the operating temperature increases, it still stays impressively low at -141.47-dB/Hz. Consequently, these outcomes indicate the 1.55- $\mu \text{m}$ DFB laser offers several advantages, reinforcing its potential as a promising device for satellite optical links.
Funding Information
  • National Science and Technology Council, Taiwan (111-2221-E-002-051-MY3, 111-2622-8-002-001, 111-2218-E-002-025, 111-2622-8-002-032, 111-3114-E-002-001, 111-2119-M- 002-008, 112-2119-M-002-013, 112-2119-M-002-015, 112-2923-E-002-008-MY3)
  • National Chung-Shan Institute of Science and Technology (NCSIST-ACOM-111-6712002, NCSIST-ACOM-112-6712002)
  • National Taiwan University (113L7843)
  • National Taiwan University System Innovation Cooperation (11112071002)
  • Powerchip Semiconductor Manufacturing Corporation (12H1004-C15, 12H1004-C16, 12H1004-C17)
  • United Microelectronics Corporation (UMC) Fellowship

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