Distortion due to gain tilt of erbium-doped fiber amplifiers

Kikushima, Koji; Yoshinaga, Hisao

doi:10.1109/68.93272

Cited by 49 publications

(11 citation statements)

References 4 publications

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“…Following this method, the estimated CSO due to chirp and dispersion is given by CSO = 20 log ( 6~) + 10 log ( N 2 ) -3dBc (6) where Nz is the number of second-order products falling at the frequency w , and a spectrum analyzer correction factor of 3 dB has been assumed. For a 62-channel NTSC system, there are 22 second-order products falling 1.25 MHz above the upper carrier (445.25 MHz).…”

Section: Impact Of Chirp Of Second-order Distortionmentioning

confidence: 99%

“…Any optical component which has loss or delay which varies with optical frequency will convert laser chirp into optical distortion. Multiple optical reflections [5] and optical amplifiers [6] are two examples of situations where frequency-dependent loss can occur. In most instances, 0733-8724/93$03.00 0 1993 IEEE wavelength-dependent loss problems can be overcome by designing components with minimal wavelength-dependent loss.…”

Section: Impact Of Chirp Of Second-order Distortionmentioning

confidence: 99%

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Optimum range for DFB laser chirp for fiber-optic AM video transmission

Blauvelt¹,

Kwong²,

Chen³

et al. 1993

J. Lightwave Technol.

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Simple expressions for the impact of the DFB laser chirp on the system noise and distortion specifications of AM CATV fiber links are derived. These expressions are found to agree well with measured results. There is a narrow range of chirp for which the degradation of both noise and distortion is low. 1310 nm lasers are found to have chirp within the acceptable range. 1550 nm lasers are found to have chirp that is unacceptably large for most CATV applications.

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Section: Impact Of Chirp Of Second-order Distortionmentioning

confidence: 99%

Section: Impact Of Chirp Of Second-order Distortionmentioning

confidence: 99%

Optimum range for DFB laser chirp for fiber-optic AM video transmission

Blauvelt¹,

Kwong²,

Chen³

et al. 1993

J. Lightwave Technol.

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show abstract

“…The distortion caused by the interaction of frequency chirp with the EDFA gain-slope under inversion-locked conditions can be found by substituting the frequency chirp amplitude for a MZ modulator ((/2)m i f m (1 − ␥)) for that of an directly modulated laser ( FM I mod m i ) in the usual expression for chirp induced CSO [2,10,11,12] …”

Section: Distortion Caused By Frequency Chirp and Edfa Gain-slopementioning

confidence: 99%

“…The most general equation describing the intermodulation distortion relative to the power in the carrier is given by [3] (11) with N the number of carriers and R eff the effective reflection coefficient of the cavity given by R eff ‫ס‬ √R 1 R 2 with R i the reflection coefficient of the mirrors of the cavity. J k is the kth order Bessel function and…”

Section: Harmonic Distortion Caused By Frequency Chirp and Optical Camentioning

confidence: 99%

Distortion Caused by the Interaction of Residual Chirp in Mach–Zehnder External Modulators with Optical Cavities, Fiber Dispersion, and EDFA Gain-Slope in Analog CATV Lightwave Systems

Willems¹,

Muys²

1996

Optical Fiber Technology

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“…IEEE Log Number 9204104. of chirp and dispersion severely limits transmission distances when standard 1310-nm fiber is used [l], [2]. Chirp also results in distortion with EDFA's due to the gain slope of the optical amplifier [3], [4]. Transmitters using solid state lasers and external modulators have high output power, low chirp, and low noise.…”

mentioning

confidence: 99%

High-power 1310 nm DFB lasers for AM video transmission

Blauvelt

Chen

Bar‐Chaim

et al. 1992

J. Lightwave Technol.

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Abstruct-Increasing the output power of linear DFB lasers is an effective method for increasing the optical loss budget of AM fiber optic links. For systems using 1310-nm zero dispersion fiber, 1310-nm lasers are preferred to avoid distortion resulting from the combination of dispersion and laser chirp. Increased optical budgets can be used to increase span lengths or to use optical splitting. In this paper, results are presented for an 18" linear laser. Using 62 channel loading, a C/N of 59.5 dB was achieved for a 20-km link with 9-dB optical loss. For 20-dB optical loss, a C/N of 50.5 dB was achieved. The current status of high power lasers and the fundamental and practical limits for further increases in power are discussed. Optoelectronic repeaters using high power lasers are shown to be an effective alternative to optical amplifiers for broadcast AM video distribution.

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Distortion due to gain tilt of erbium-doped fiber amplifiers

Cited by 49 publications

References 4 publications

Optimum range for DFB laser chirp for fiber-optic AM video transmission

Optimum range for DFB laser chirp for fiber-optic AM video transmission

Distortion Caused by the Interaction of Residual Chirp in Mach–Zehnder External Modulators with Optical Cavities, Fiber Dispersion, and EDFA Gain-Slope in Analog CATV Lightwave Systems

High-power 1310 nm DFB lasers for AM video transmission

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