Single-longitudinal-mode tunable WDM-channel-selectable fiber laser

Abstract

We report operation of a single-longitudinal-mode WDMchannel-selectable fiber laser. The use of a tunable fiber Bragg grating and a linewidth narrowing saturable absorption filter in conjunction with an intracavity etalon enabled single-frequency emission and discretely tunable WDM channel operation without the need for external wavelength locking modules. Side mode suppression ratios (SMSRs) > 50 dB have been demonstrated with ~ 3 dBm individual channel output powers for 8 channel (f = 50 GHz) operation of this WDM source.

Opto-VLSI-based tunable single-mode fiber laser

“…An additional attractive feature of fiberbased laser sources is their large gain bandwidth across the S-, C-and L-bands, which enables considerable flexibility in wavelength/bandwidth selection and allocation in dynamic optical systems and networks. Single-mode fiber lasers have widely been investigated for optical communication applications [1][2][3][4][5][6][7][8][9]. In particular, erbium-doped fiber lasers offer several advantages, such as the broad emission spectrum and homogeneously-broadened gain characteristics, resulting in a high side-mode suppression ratio.…”

“…Several reported approaches to realizing single-mode tunable fiber ring lasers have been reported, including the use of fiber Bragg gratings (FBGs) [1][2][3], acousto-optic tunable filter [4,5], and Fabry-Perot or etalon filters [6][7][8][9]. Since an FBG can be tuned easily through either heating or applying strain along the FBG, FBG-based fiber ring lasers are subject to environmental changes, which result in high packaging cost and limited tuning range.…”

Single-frequency Wavelength Tunable Erbium-doped Fiber Ring Laser

“…특히 모드 호핑(mode hopping) 없이 발진파장을 변환할 수 있는 단일 주파수(종모드) 광섬유 레이저는 wavelength division multiplexing (WDM), coherent 통신 시스템, 광 센서 시스템 등에서 높은 활용성을 가지고 있다 [1][2][3][4] . 그러나, 광섬유 레이저는 보통 긴 공진기 길이와 좁은 종모드간 간격으로 인하여 발생하는 모 드 호핑 현상과 함께 다수의 주파수 모드로 동작한다.…”

Tunable ring laser based on a semiconductor optical amplifier at 1300 nm using a simple wavelength selection filter

“…Commercial and scientific interest in tunable lasers continues to grow rapidly because of their potential application in optical components testing, fiber optic sensors, and wavelength division multiplexing (WDM) transmission systems [1,2]. Most TLSs are developed at the 1.5 μm wavelength region which the optical communication fields use.…”