Coherent light generators – Particular beam control device – Optical output stabilization
Reexamination Certificate
2007-03-06
2007-03-06
Harvey, Minsun Oh (Department: 2828)
Coherent light generators
Particular beam control device
Optical output stabilization
C372S038070, C372S029015, C372S029020
Reexamination Certificate
active
10730568
ABSTRACT:
Disclosed is a method for maintaining wavelength-locking of a Fabry-Perot laser regardless of a change of external temperature even though a temperature controller is not used, and a wavelength division multiplexing (WDM) light source using the method, as an economical light source used in a WDM optical communication field. The WDM light source comprises a Fabry-Perot laser for injecting spectrum-spliced incoherent light to amplify and output only an oscillation mode matching with a wavelength of the injected light, and a bias controlling unit for adjusting a bias current supplied to the Fabry-Perot laser to a value adjacent to a threshold current of the Fabry-Perot laser, whose threshold current is changed according to a temperature and a relationship between the injected light changed depending to a temperature and a wavelength of the oscillation mode. Therefore, the bias current having a value adjacent to the threshold current of the Fabry-Perot laser is supplied to the Fabry-Perot laser, so that the Fabry-Perot laser can maintain an excellent transmission characteristic regardless of a change of temperature even though a temperature controller is not used.
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Kim, Hyun Deok et al.; A Low-Cost WDM Source with an ASE Injected Fabry-Perot Semiconductor Laser, IEEE Photonics Technology Letters, vol. 12, No. 8 (2000) 4 pgs.
Hwang Seong-Taek
Jung Dae-Kwang
Lee Jea-Hyuck
Lee Jung-Kee
Oh Yun-Je
Cha & Reiter L.L.C.
Flores Ruiz Delma R.
Harvey Minsun Oh
Samsung Electronics Co,. Ltd.
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