• Journal of the Optical Society of Korea
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• 제13권2호
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• pp.240-244
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• 2009

An Er-doped superfluorescent fiber source is designed and constructed with the double-pass forward configuration, which aims at high stability of its mean wavelength against temperature variation. As a result, thermal stability of mean wavelength better than 1 ppm is obtained against the temperature variation of ${\pm}5^{\circ}C$ around the optimum operating temperature. The optimum operating temperature can be tuned with the Er-doped fiber length and the pump power.

• 한국광학회지
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• 제14권4호
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• pp.449-453
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• 2003

자이로스코프용 광대역폭 erbium 첨가 광섬유 광원에서 중심파장의 편광의존성을 억제하기 위하여 펌프광의 편광을 변조함으로써 스크램블링하는 방식을 사용하였다. 원통형 PZT에 광섬유를 감은 형태의 편광변조기에 적정진폭의 변조를 가함으로써 펌프광의 편광도(시간평균치)를 1.4%까지 낮출 수 있었다. 펌프 편광 스크램블러와 출력단 depolarizer를 함께 사용한 경우에 임의의 편광변화에 대한 광원의 중심파장 변화가 측정기의 측정한계(∼5 ppm) 이하로 관찰되었다.

• 한국광학회:학술대회논문집
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• 한국광학회 2000년도 제11회 정기총회 및 00년 동계학술발표회 논문집
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• pp.96-97
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• 2000

Incoherent broadband optical sources have been applied in various areas such as a light source for optical device characterization, fiber-optic gyroscopes$^{(1)}$ , and spectrum sliced light source in wavelength division multiplexing (WDM) system$^{(2)}$ . To utilize the inherent low loss in silica optical fibers, various types of incoherent light sources are being developed. Among the light sources, the amplified spontaneous emission (ASE) from a rare earth doped fiber has benefits in temperature stability, high output power, low polarization dependence over semiconductor diodes$^{(3)}$ . Recently erbium doped fibers (EDF) have been intensively researched for ASE sources as well as optical amplifiers$^{(4)}$ . The spectrum of ASE from an EDF, however, is limited in the 1520~1560 nm range in conventional configurations. In this letter we described a new broadband ASE source which included both the conventional ASE band of Er$^{3+}$ ion, 1520nm~1560nm and ASE band from Tm$^{3+}$ ions that extends the bandwidth further. For the first time, to the best knowledge of authors, a fiber ASE source based on the energy transfer between Er$^{3+}$ and Tm$^{3+}$ ions in the range of 1460~1550 nm, has been demonstrated using a single 980nm pump laser diode. (omitted)omitted)

• 한국광학회:학술대회논문집
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• 한국광학회 2007년도 동계학술발표회 논문집
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• pp.215-216
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• 2007

Isolator가 삽입된 Erbium 첨가 광섬유광원을 제작하였고 그 특성을 측정하였다. Isolator 삽입 유무에 따른 광섬유광원의 전 온도구간($-32^{\sim}75^{\circ}C$)에서의 중심파장 안정도는 수 ppm으로 큰 차이를 보이지 않았고, 귀환광 변화($-22^{\sim}-20dB$)에 따른 중심파장 안정도에서는 isolator 삽입이후에 1.6ppm으로 귀환광 변화에 매우 둔감한 결과를 얻었다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 E
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• pp.2207-2208
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• 1999

In this paper, we would like to study the oscillation characteristics of single mode fiber laser which is composed of a Fabry-Perot resonator, a pump source of 808nm Laser Diode, a $Er^{3+}$ doped single mode fiber with 0.5um diameter.