A tunable dual-wavelength fiber ring-cavity laser based on semiconductor optical amplifier using two external-injected DFB lasers

The effect of semiconductor saturable absorber mirror (SESAM) on continuous-wave multi-wavelength fiber ring-cavity laser with semiconductor optical amplifier (SOA) is experimentally demonstrated. The evolutionary process of multi-wavelength oscillation and the decrease of oscillating mode number caused by an SESAM are discussed. It’s found that the free oscillating mode number of the multi-wavelength fiber ring-cavity laser with SOA can be upto three, and the lasing wavelengths are 1573.8 nm, 1578.09 nm and 1582.37 nm, respectively. When a SESAM is inserted in the fiber ring-cavity, it narrows the amplified spontaneous emission (ASE) spectrum of the SOA, and the oscillating mode number of the multi-wavelength fiber ring-cavity lasers with SOA decreases to two, a stable dual-wavelength lasing at 1560.91 nm and 1564.12 nm is obtained.

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Fiber ring-cavity laser based on semiconductor optical amplifier

International Journal of Modern Physics B ◽

10.1142/s0217979218502661 ◽

2018 ◽

Vol 32 (24) ◽

pp. 1850266

Author(s):

Min Luo ◽

Wei Cao ◽

Haiyan Chen

Keyword(s):

Quantum Wells ◽

Fiber Bragg Grating ◽

Semiconductor Optical Amplifier ◽

Operating Temperature ◽

Ring Cavity ◽

Optical Amplifier ◽

Injection Current ◽

Bragg Grating ◽

Center Wavelength ◽

Fiber Ring

A fiber ring-cavity laser based on InP/InGaAsP multi-quantum wells semiconductor optical amplifier is proposed and experimentally demonstrated. The laser uses InP/InGaAsP multi-quantum as well as the gain medium and fiber Bragg grating as the wavelength selector. It’s demonstrated that the center wavelength of the output amplified spontaneous emission spectrum for the InP/InGaAsP multiple-quantum wells appears blue shift when its injection current increases. A lasing at central wavelength of 1549.66 nm with the maximum output power of 1.524 mW is obtained with electro-optical efficiency of 1.1% at injection current of 220 mA and the fiber Bragg grating operating temperature of 23[Formula: see text]C. The threshold injection current of the laser is 78 mA. When the operating temperature of fiber Bragg grating increases from 8[Formula: see text]C to 28[Formula: see text]C, the center wavelength of output laser increases from 1549.27 to 1549.59 nm. It shows that the laser has good temperature stability.

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Orthogonal Dual-Frequency SOA-Fiber Laser

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.596.129 ◽

2013 ◽

Vol 596 ◽

pp. 129-133

Author(s):

Yoshitaka Takahashi ◽

Yudai Fukaya ◽

Sho Takahashi

Keyword(s):

Semiconductor Optical Amplifier ◽

Ring Laser ◽

Ring Cavity ◽

Optical Amplifier ◽

Dual Frequency ◽

Heterodyne Interferometry ◽

Fiber Ring Laser ◽

Fiber Ring ◽

Frequency Laser ◽

Heterodyne Signal

In order to develop a new orthogonal dual-frequency laser, we studied a fiber ring laser using a SOA (semiconductor optical amplifier) and aim to apply it to a novel light source for optical heterodyne interferometry. The frequency difference was generated by a linear or circular birefringent medium inserted into the ring cavity. To obtain heterodyne signal optical and electrical filters were introduced.

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